Nantuko Husk

Sacrifice a creature: Nantuko Husk gets +2/+2 until end of turn.

Mastermind's Acquisition

Choose one —
• Search your library for a card, put it into your hand, then shuffle.
• Put a card you own from outside the game into your hand.

Sacrifice a creature: Phyrexian Ghoul gets +2/+2 until end of turn.

Defender
Sacrifice another creature: Corpse Blockade gains deathtouch until end of turn.

Nim Shambler gets +1/+0 for each artifact you control.
Sacrifice a creature: Regenerate Nim Shambler.