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{U/R}: Frostburn Weird gets +1/-1 until end of turn.

{5}{G}: Regenerate Selesnya Sentry.

Defender Reach (This creature can block creatures with flying.) {1}{B}{G}: Regenerate Trestle Troll.

Armory Guard has vigilance as long as you control a Gate.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Scavenge {1}{B}{G} ({1}{B}{G}, Exile this card from your gravey...

Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

Skull Rend deals 2 damage to each opponent. Those players each discard two cards at random.

Flash (You may cast this spell any time you could cast an instant.) Vigilance

Instant and sorcery spells you cast cost {1} less to cast.

Counter target creature spell. Essence Backlash deals damage equal to that spell's power to its controller.

Return target creature to its owner's hand. You gain 2 life.

Create a 3/3 green Centaur creature token, then populate. (Create a token that's a copy of a creature token you control.)

Put a +1/+1 counter on target creature. Put a +1/+1 counter on target creature.

Target creature you don't control gets -2/-0 until end of turn and attacks this turn if able. Overload {3}{U}{R} (You may cast this spell for its o...

When Centaur Healer enters the battlefield, you gain 3 life.

Target creature gets +4/-4 until end of turn.

Enchant land Enchanted land has "Untap this land during each other player's untap step."

Reach (This creature can block creatures with flying.)

{2}{B}: Stonefare Crocodile gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Enchant creature When Knightly Valor enters the battlefield, create a 2/2 white Knight creature token with vigilance. (Attacking doesn't cause it t...

Trample Scavenge {5}{G}{G} ({5}{G}{G}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target cre...

Create a 4/4 green Rhino creature token with trample, then populate. (Create a token that's a copy of a creature token you control.)