R'leyh, God of Nightmares

Flying, Indestructible, Annihilator 2
{b}{b} Remove any abilities from target permanent.(Shroud, Hexproof, Indestructible, etc.)
Whenever a Shadow({b}) is played under your control, add a +1/+1 to creatures you control.
This creatures toughness is equal to your devotion to Shadow({b})