Flying, vigilance, deathtouch, lifelink

At the beginning of your end step, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Jarad, Golgari Lich Lord gets +1/+1 for each creature card in your graveyard.

{1} {B} {G}, Sacrifice another creature: Each opponent loses life equal to the sacrificed creature's power.

Sacrifice a Swamp or a Forest: Regenerate Jarad.

First strike, haste

Creatures with +1/+1 counters have haste and cannot block.

Whenever a creature enters the battlefield, you may put a +1/+1 counter on it.

First strike, haste

Creature with +1/+1 counters on them have haste and cannot block.

Whenever a creature enters the battlefield, you may put a +1/+1 counter on it.

Flying, trample

Whenever another creature dies, Rakdos gains +X/+0 until end of turn, where X is that creatures power.

At the beginning of each player's end step, Rakdos deals 6 damage to that player unless a creature died this turn.