Mirrodin Besieged

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

This spell can't be countered. Hexproof (This creature can't be the target of spells or abilities your opponents control.) {1}{G}: Regenerate Thrun...

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

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

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

Double strike, protection from black and from green

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

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

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

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 beginning of y...

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

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...

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

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

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...

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

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 ...

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

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

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

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 beginning of y...

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

When Oculus dies, you may draw a card.