Dog, Rat??

Deathtouch
At the start of the game search your library
for Dog, Rat?? and put it into the battlefield.
If Dog, Rat?? deals combat damage to a player they
lose the game.
Dog, Rat?? can not leave the battlefield.
If Dog, Rat?? deals combat damage to a creature or
blocked by a creature, destroy that creature.
Dog, Rat?? can only be blocked by four or
more creatures.