Mirrodin Besieged

Put a -1/-1 counter on target creature. When that creature dies this turn, its controller gets a poison counter.

When Myr Sire dies, create a 1/1 colorless Phyrexian Myr artifact creature token.

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

Red Sun's Zenith deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead. Shuffle Red Sun's Zenith ...

({T}: Add {B}.)

(A player with ten or more poison counters loses the game.)

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...

({T}: Add {R}.)

Create two 1/1 colorless Myr artifact creature tokens.

({T}: Add {U}.)

When Massacre Wurm enters the battlefield, creatures your opponents control get -2/-2 until end of turn. Whenever a creature an opponent controls d...

Equipped creature gets +1/+0 and has first strike. Equip {1}

({T}: Add {B}.)

First strike, protection from red and from white Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in th...

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

({T}: Add {W}.)

({T}: Add {R}.)

({T}: Add {G}.)

({T}: Add {W}.)

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...

({T}: Add {B}.)

({T}: Add {W}.)

Metalcraft — Ardent Recruit gets +2/+2 as long as you control three or more artifacts.