Eldrazi Takeover

Enchant creature
You control enchanted creature.
Enchanted creature gets +8/+8 and Annihilator
4.
If Eldrazi Takeover is in your opening hand, you
may exile it. If you do, reveal a creature card you
own from outside the game, put it on the battlefield, and attach this enchantment to it.
The creature is an Eldrazi Horror in addition to
its other types. Put a devoid counter on it.