
Creatures with power 7 or greater can't attack or block.
Whenever chaos ensues, create a 7/7 colorless Eldrazi creature token with annihilator 1. (Whenever it attacks, defending player sacrifices a permanent of their choice.)
Hedron Fields of Agadeem has 3 printings, first in Planechase 2012 Planes (2012). It has 1 official ruling.