Mirrodin Besieged

Sacrifice an artifact: Regenerate Rusted Slasher.

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

When Piston Sledge enters the battlefield, attach it to target creature you control. Equipped creature gets +3/+1. Equip—Sacrifice an artifact.

When Pierce Strider enters the battlefield, target opponent loses 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.)

When Peace Strider enters the battlefield, you gain 3 life.

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

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

Whenever another artifact is put into a graveyard from the battlefield, Magnetic Mine deals 2 damage to that artifact's controller.

Flying

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

{2}{B}: Dross Ripper gets +1/+1 until end of turn.

{4}, {T}: Target opponent loses 2 life, gets a poison counter, then puts the top six cards of their library into their graveyard.

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

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

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

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.

Trample, infect, indestructible If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it in...

{W}: Bladed Sentinel gains vigilance until end of turn.

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

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

{3}, {T}: Put a charge counter on Titan Forge. {T}, Remove three charge counters from Titan Forge: Create a 9/9 colorless Golem artifact creature t...

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 cr...