Phantasmal dreadmaw

Trample
Conjure{1}{g}{g}{u}
Whenever phantasmal dreadmaw is shuffled into your library, create a 6/6 green and blue dinosaur token with trample and "whenever this creature is dealt damage, sacrifice it"
If you see a flash in the air, hide. If you see a blur
on the ground, run. If you see its form, it's too late