Cathedral of War

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.

At the beginning of your upkeep, draw a card. T: This artifact deals 1 damage to any target.

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.