hmmm... traumatizing yourself with a 40 or 50 card deck and youve got it without dying. that would completely make mindless dreadnot unstoppable in multiples, yet i think stupid ooze is at the right mana cost,
maybe you should make it

the correct power toughness wording would be 20-x/20-x
also you might want to change the name as noone will take stupid ooze very seriously