Grz'oth, Sower of Madness

Flying, trample, haste, indestructible.
Other Demons you control get +2/+2, trample
and are Eldrazi in addition to their other types.
Whenever Grz'oth, Sower of Madness deals
combat damage to a player, gain control of target creature they control. It becomes an Eldrazi
Demon (it loses all other creature types).
(Transforms from Grz'oth, Sword of Power.)