Scars of Mirrodin

When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate ...

Chimeric Mass enters the battlefield with X charge counters on it. {1}: Until end of turn, Chimeric Mass becomes a Construct artifact creature wit...

Players can't search libraries. Any player may pay {2} for that player to ignore this effect until end of turn.

Equipped creature gets +6/+6. Whenever equipped creature attacks, destroy target permanent. Equip {6}

Trample, haste Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) At the...

Reveal the top X cards of your library. You may put any number of permanent cards with mana value X or less from among them onto the battlefield. T...

Metalcraft — As long as you control three or more artifacts, Ezuri's Brigade gets +4/+4 and has trample.

At the beginning of your upkeep, create a 2/2 white Cat creature token for each Equipment attached to Kemba, Kha Regent.

{G}: Regenerate another target Elf. {2}{G}{G}{G}: Elf creatures you control get +3/+3 and gain trample until end of turn.

Whenever Engulfing Slagwurm blocks or becomes blocked by a creature, destroy that creature. You gain life equal to that creature's toughness.

Creatures you control have hexproof. (They can't be the targets of spells or abilities your opponents control.) {1}{G}: Regenerate target creature.

Whenever a land enters the battlefield under an opponent's control, if that player had another land enter the battlefield under their control this ...

{1}{R}{R}: Spikeshot Elder deals damage equal to its power to any target.

Seachrome Coast enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {W} or {U}.

{3}, {T}: Create a token that's a copy of Myr Propagator.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Other creatures you c...

Flying Carnifex Demon enters the battlefield with two -1/-1 counters on it. {B}, Remove a -1/-1 counter from Carnifex Demon: Put a -1/-1 counter on...

Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Whenever a permanent deals damage to you, return it to its owner's hand.

Creatures you control have double strike and lifelink.

Artifact creatures you control get +2/+2.

Razorverge Thicket enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {G} or {W}.

Darkslick Shores enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {U} or {B}.

Copperline Gorge enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {R} or {G}.