Adzerak, Host of Ur'Gath

Flying
Whenever Adzerak, Host of Ur'Gath enters the battlefield, put a host counter on any number of creatures you control. Creatures with host counters can't attack or block unless Adzerak attacks or blocks. These creatures do so with the same targets as Adzerak.
You may have Adzerak activate the abilities of creatures with host counters as though he had those abilities.