Seath the Scaleless

Menace
When Seath the Scaleless enters the battlefield, create a 0/1 Crystal artefact (Seath the scaleless has hexproof, indestructible.)
Seath the Scaleless can block up to 3 attacking creatures
When Seath the Scaleless is blocking, his attacking power is equal to current attacking power times the number of creatures he is blocking.