Mirrodin Besieged

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

Trample

Vigilance Kemba's Legion can block an additional creature each combat for each Equipment attached to Kemba's Legion.

Melira's Keepers can't have counters put on it.

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

Sacrifice Gore Vassal: Put a -1/-1 counter on target creature. Then if that creature's toughness is 1 or greater, regenerate it.

When Kuldotha Flamefiend enters the battlefield, you may sacrifice an artifact. If you do, Kuldotha Flamefiend deals 4 damage divided as you choose...

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

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

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

When Caustic Hound dies, each player loses 4 life.

At the beginning of your upkeep, you may put a charge counter on target artifact.

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.

Flying Whenever Victory's Herald attacks, attacking creatures gain flying and lifelink until end of turn.

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.

Sacrifice an artifact: Regenerate Rusted Slasher.

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

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

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

Flying

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