Mirrodin Besieged

{T}: Attach target Equipment you control to target creature you control.

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

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

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

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

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

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

When Leonin Relic-Warder enters the battlefield, you may exile target artifact or enchantment. When Leonin Relic-Warder leaves the battlefield, ret...

Whenever an artifact is put into a graveyard from the battlefield, you may gain 5 life.

Flying Whenever you cast an artifact spell, you may untap target creature.

{T}, Sacrifice a creature: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Flying At the beginning of your upkeep, if you control no Thopters other than Thopter Assembly, return Thopter Assembly to its owner's hand and cre...

Haste Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.) Whenever Hero of Oxid Ridge attacks,...

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...

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

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

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.

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

Sacrifice an artifact: Regenerate Rusted Slasher.

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

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

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.) Kuldotha Ringleader attacks each combat if...

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