The Brain Of Cthulhu

Flying, Shroud, Legendary Myriad (When this creature attacks, for each other opponent, create a non-legendary copy of this creature attacking that player.)
When you cast The Brain Of Cthulhu,
create five 1/2 red Eye creature tokens with
"This creature must attack if able."
The Brain Of Cthulhu can't attack if you control tokens created by this Permanent