Staff of Nin

Whenever another creature enters, you may put X +1/+1 counters on this creature, where X is that creature's power.

Magmaquake deals X damage to each creature without flying and each planeswalker.

This land enters tapped. Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) T: Add C.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) 2B, T: Put a petrification counter on target creature. It gains defender and becomes a colorless artifact in addition to its other types. Its activated abilities can't be activated. (A creature with defender can't attack.)

When this creature enters, search your library for a creature card with deathtouch, hexproof, reach, or trample and reveal it. Shuffle and put that card on top.