Charnel Troll

Trample
At the beginning of your upkeep, exile a creature card from your graveyard. If you do, put a +1/+1 counter on Charnel Troll. Otherwise, sacrifice it.
{B}{G}, Discard a creature card: Put a +1/+1 counter on Charnel Troll.

Doran, the Siege Tower

Each creature assigns combat damage equal to its toughness rather than its power.

Baloth Null

When Baloth Null enters, return up to two target creature cards from your graveyard to your hand.

Knight of New Alara

Each other multicolored creature you control gets +1/+1 for each of its colors.

Vindicate

Citadel Castellan

Vigilance (Attacking doesn't cause this creature to tap.)
Renown 2 (When this creature deals combat damage to a player, if it isn't renowned, put two +1/+1 counters on it and it becomes renowned.)

Finality

You may put two +1/+1 counters on a creature you control. Then all creatures get -4/-4 until end of turn.