Mirrodin Besieged

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

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

Return up to two target creature cards from your graveyard to your hand.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

When Viridian Emissary dies, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

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

Reach (This creature can block creatures with flying.) Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players...

Put target creature card from an opponent's graveyard onto the battlefield under your control. It gains haste. Exile it at the beginning of the nex...

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Lifelink (Damage deal...

Living weapon (When this Equipment enters the battlefield, create a 0/0 black Germ creature token, then attach this to it.) Equipped creature gets ...

Destroy all artifacts.

As Phyrexian Revoker enters the battlefield, choose a nonland card name. Activated abilities of sources with the chosen name can't be activated.

Flying Whenever a creature an opponent controls dies, you may gain 3 life. Whenever an opponent discards a card, you may gain 3 life.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever Septic Rats ...

At the beginning of your upkeep, you may have Cryptoplasm become a copy of another target creature, except it has this ability.

Target player discards a card, then mills a card.

Put target artifact, creature, or enchantment on top of its owner's library.

Sacrifice an artifact: Regenerate Rusted Slasher.

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Destroy target creature with flying. Its controller gets a poison counter.

Counter target spell, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Defender Metalcraft — As long as you control three or more artifacts, Spire Serpent gets +2/+2 and can attack as though it didn't have defender.

Trample