BLACK:

Crypt Rats
Card Advantage wins games, and sealed is creature intensive. 
It's like a black Savage Twister. (Rats of God). 
Helps in later games if you play one in an earlier game as 
the opponent is afraid to put too many creatures in play while
you have freedom. (critremoval/cardadv, global, dd all-in-one).
*COMMON*

Fallen Askari
Cheap flanker, good for attacking. Best 2nd turn creature.
*COMMON*

Coercion
Awesome hand destruction in limited format.
Cheaper than your opponent's fatties, and easy to cast.
Coercion your torch! Rip that clutch but situation specific spell
out of the opponents hand AND get a look at his other cards.
Great early card for removing the biggest threat, or taking the 
Trick card, Like A ray, torch or rock slide.
*COMMON*

Wake of Vultures
3/1 flying says it all, with so little direct damage/removal, it's 1 
toughness is irrelevant. Nice in combo with Roaches.
*COMMON*

Infernal Harvest
Although the drawback is clear, Harvest can gain you cards (4-6 
swamps = 4-6 damage to divide among your choosing). Removal is sparse 
in this environment. Creature sweeper.
*COMMON*

Tar Pit Warrior
Cheap fattie. Minor drawback, as most targetted effects are creature
kill anyways.
*COMMON*

Nekrataal
Gotta love it - good 2/1 creature and terror built in.
*UNCOMMON*

Necromancy
Either get your best creature or his best creature back after they 
get killed off.  Being able to play it as an instant provides nifty 
tactical advantage as well.
*UNCOMMON*

Brood Of Cockroaches
Very hard to get rid of. Endlessly hold off a big creature for 1 
life per turn.
*UNCOMMON*

Vampiric Tutor
Library search for B, useful for getting proper card in situation. 
The second best card to draw in your deck.
*RARE*

Necrosavant
Just keeps coming back.  Should be ample sacrifice fodder in this 
environment. The ultimate re-usable fattie.
*RARE*

Kaervek's Spite
Killing Blow - pulls off the last few points for you!
*RARE*

BLUE:

Breezekeeper
Nothing special, just a 4/4 flyer that's easy to cast.  Big
Flyers are so hard to handle in sealed deck that the phasing 
drawback isn't that much of a drawback.
*COMMON*

Man 'o war
The first of the two big unsummoners in blue. Sets you opp 
back a round and clears the way for an attack. The blue
torch. Great turn economy; it's also card advantage if it 
removes a local enchantment (be it a Pacifism on your own 
creature or a booster on your opponent's).
*COMMON*

Undo
This can easily gain you card advantage, there are plenty of
good creature enchantments so you always find that at LEAST 
you are going 1 for 1... more importantly, a well timed undo 
forces an opponent to block with his inferior creatures or 
take damage... either way , you come out ahead.
*COMMON*

Knights of the Mist
In Visions, he's just ok, since there are only 3 other knights. Now in 
Visions/Mirage/weatherlight, he's your own personal nekrataal but better 
and cheaper.
*COMMON*

Impulse
Deck cycling is crucial in sealed/draft. Good early, good late.  
Easy to cast and doesn't give up card advantage.  If you play 
second (which is the popular choice in sealed deck), use a 40
card deck and cast this on the 2nd turn you have a better than 
13% chance of pulling that clutch spell.  If not, you are 4 turns 
closer to drawing it.  Helps fight mana screw.
*COMMON*

Cloud Elemental
Flying Beatdown. Good 3rd turn creature.
*COMMON*

Waterspout Djinn
4/4 flyer, 4 mana... nough said. Only fools play him out on the 4th turn
if their deck requires more than 4 lands to play well, so, they only 
reason he has a drawback is if, well, you are a fool.
*UNCOMMON*

Rainbow Efreet
Flier, phases at will, reasonable cost...
*UNCOMMON*

Ovinomancer
Bye-bye fattie, hello there sheep. Reusable creature control is strong.  
Returning 3 lands isnšt that bad when youšre trying to break a creature 
stalemate.
*UNCOMMON*

Dream Tides
Creature control, shuts down Green and helps prevent weenie-beatdowns
*UNCOMMON*

Desertion
Only counterspell in Visions. Creatures are key in Sealed/Draft.  
Countering an opponents and gaining control of it is a game swinging move.
*RARE*

GREEN:

RiverBoa
Because of few anti-regeneration spells in draft, the River boa 
is almost invincible as long as you have the mana. 
*COMMON*

Qurion Ranger
Untap a suprise blocker or attack without fear of the counterattack.  
Granger a 2/2.  Escape mana screw.  This guy does it all.  One of the 
few 1/1's worth using.
*COMMON*

Bull Elephant
Cheap 4/4 with small drawback.  Easy G3 casting cost for multicolor. 
*COMMON*

Warthog
Swampwalk extremely useful on a 3-power creature. GG in casting cost makes 
it harder to cast, but worth it.
*COMMON*

Elven Cache
Good 1 for 1 card, spell.  Can get necessary card back if destroyed. 
Now you're playing with 2 rockslides... 2 undo's, 2 of my best creatures. 
*COMMON*

Panther Warriors
Fairly big creature, 6 damage for 5 mana, and only 1 colored.  Can't block 
flankers and live, though.  Just attack with it, baby.
*COMMON*

Giant Caterpillar
3/3 for 4 mana is not that great, but the ability means that it basically 
cannot be the target of spells or effects unless you so wish it. And flyers 
are a rare commodity in Sealed/Visions.
*COMMON*

Emerald Charm
Very versatile, easily the most useful of the charms, the ability to unblock 
creatures is huge. The closest thing Green has to Creature removal.  Great 
Suprise Value and can also be used to take care of a gossamer chains.
*COMMON*

Creeping Mold
Good all around destruction, best enchantment destruction card in Visions.
*UNCOMMON*

Stampeding Wildebeests
Not much that can stop a 5/4 trampler. The unsummon upkeep can get rid of 
Pacifisms/Thirsts/Betrayal and is managable in sealed envirnment.
*UNCOMMON*

Elephant Grass
Stops black for 5+ rounds. Just about stops anything else for 5+ rounds too.
Perfect for anytime in the game.  Early game you can use it to wait for 
your mana to build without worrying about attacks. Mid-Game you can attack 
with your big creatures and only leave a few creatures for defense.  End-Game 
you can sit back and wait for that red X spell or wait for the mana to cast 
the X spell and finish your opponent.
*UNCOMMON*

Quirion Druid
Tons of flak critters - Talk about card advantage.
*RARE*

City of Solitude
No rockslide, no feral instict or any creature enhancements on my turn, no 
healing, no regen, and no quicksand.
*RARE*

Rowen
This card can win you the game on it's own if you manage to pull it out 
quickly due to the card and drawing advantage it provides (no wasted draw).
With a sealed deck of almost 1/2 mana, this is like gain an extra card 
every turn. Ouch.
*RARE*

RED:

Rock Slide
Only anti-creature card for red that is in form of direct damage.  
Limited to ground-pounding creatures, but RX cost is easy to pay. 
Good many to one card advantage. Worth putting 2 mountains in your 
sealed deck even if this is the only red spell in it.
*COMMON*

Fireblast
Awesome direct damage, great card to accumulate in hand till end game.  
It's hard to splash red and play this but few sealed decks that can
include 3-4 mountains won't play this.
*COMMON*

Suq'ata Lancer
If played at right time, Suq'ata Lancer is like a 2 damage fireball.  
If the opponent cannot destroy it the next turn, you also get a free 2/2 
flanker. Flankers in general are hard to handle in sealed and this ties
with Fallen Askari as the fastest 2 power flanker (both can attack on 
turn 3).  But, unlike the Askari, the lancer can block flankers too!
*COMMON*

Keeper of Kookus
Early in the game it's a 1/1 for one mana.  Later on, it'll block the biggest 
red creature over and over again.
*COMMON*

Hulking Cyclops
5/5 for 5 mana with a negligable drawback. Let's face it, how often 
do you keep your 5/5 back to block anyways?).
*UNCOMMON*

Viashino Sandstalker
Good unaffected by summoning sickness creature for red. Immune to fireball 
disintegrate and other similar spells. If you can afford a RR spell, then 
this gives you a decent chance for a quick beatdown win.  If you don't 
draw it early, the worst case will find it killing off a 2 power blocker.
*UNCOMMON*

Spitting Drake
A red flyer? Gotta get it!
*UNCOMMON*

Relentless Assault
Can deliver the killing blow, this card is so broken in sealed with a few 
creatures to attack...
*RARE*

Ogre Enforcer
Immune to weenies and creature+direct damage combos  More offensive than 
defensive, but tough to stop.
*RARE*

Bogardan Phoenix
Good flier that must be killed twice!
*RARE*

WHITE:

Gossamer Chains
Creature Control. Stops fliers and regenerators.  Mana is usually more 
plentiful in sealed and there is little enchantment destruction.
*COMMON*

Knight of Valor
Superflanker!  He gets the nod over the Crusader Because he is Common, and 
only a single W mana to cast.
*COMMON*

Remedy
It's like a Wrath of God for 2 mana.  And it's played during DAMAGE
PREVENTION so your opponent can't surprise you with a Giant Growth in 
response to this.
*COMMON*

Freewind Falcon
Quick flyer that canšt be toasted.
*COMMON*

Sun Clasp
Not much can stop your clasped Knight of Valor. Sun Clasp your Nekrataal and 
when you cant get through or can't deal with a creature, pop it back to your 
hand. That ability makes it so that if you play right (leave a white open
at all times) you should never lose card advantage like you do so often with 
creature enchantments.
*COMMON*

Parapet
Makes all those little white flankers a lot harder to deal with. Incredible in 
sealed, pumping all of your creatures in toughness and also having a marvelous 
surprising effect.
*COMMON*

Infantry Veteran
Right on the mana curve, 1/1 for 1, and his special ability can mean your 
creatures always get through on offense.
*COMMON*

Honorable Passage
Many sealed games are decided by a red x spell, can also save a creature.  
The fact that red is the most comon form of creature removal is a bonus.
Most decks play red for burn, giving you 2/1 advantage (tap X opps lands 
to do him X-1 points of damage). Works well even if your opp is not
playing red. Cast it in the first game, your opponent has something to 
think about for the rest of the match.
*UNCOMMON*

Miraculous Recovery
Just broken. Can't be disenchanted, gives a +1/+1 boost, and an instant to boot.
*UNCOMMON*

Longbow Archer
Flyers are essential, mostly to block other flyers. For 2 mana this guy is 
first strike 2/2 flyer. Ouch.
*UNCOMMON*

Zhalfirin Crusader
Cheap flanker with powerful redirecting ability. If you get this one you can 
be happy, because with a bit of white mana it's almost insane what you can 
do with it as a blocker or attacker and it even has flanking.
*RARE*

Archangel
Big white flyer. Hard to destroy, does not tap. Game Ender.
*RARE* 

Retribution of the meek
Mass card control, excellent! Slow down that big green creature assault.
*RARE*

ARTIFACTS and LAND:

SNAKE BASKET

Dragon Mask

Magma mine

Triangle of War

Undiscovered Paradise:  Great to have in 3 color decks.

Quicksand