Mirrodin Besieged

Attacking creatures get +1/+0 and gain first strike until end of turn.

Sacrifice an artifact: Gnathosaur gains trample until end of turn.

Destroy target noncreature artifact.

Concussive Bolt deals 4 damage to target player or planeswalker. Metalcraft — If you control three or more artifacts, creatures controlled by that ...

When Blisterstick Shaman enters the battlefield, it deals 1 damage to any target.

Burn the Impure deals 3 damage to target creature. If that creature has infect, Burn the Impure deals 3 damage to that creature's controller.

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

When Phyrexian Rager enters the battlefield, you draw a card and you lose 1 life.

When Caustic Hound dies, each player loses 4 life.

As an additional cost to cast this spell, sacrifice a creature. Draw three cards.

Creatures your opponents control get -2/-0 until end of turn.

When Oculus dies, you may draw a card.

Training Drone can't attack or block unless it's equipped.

{2}{G}: Regenerate Tangle Hulk.

{R}: Target creature can't block Spin Engine this turn.

Shriekhorn enters the battlefield with three charge counters on it. {T}, Remove a charge counter from Shriekhorn: Target player puts the top two ca...

Metalcraft — Razorfield Rhino gets +2/+2 as long as you control three or more artifacts.

Flying

{U}: Gust-Skimmer gains flying until end of turn.

Equipped creature gets +2/+2 and can't block. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Shriekhorn enters the battlefield with three charge counters on it. {T}, Remove a charge counter from Shriekhorn: Target player mills two cards.