Ditto

You may have Ditto enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it’s a creature, it enters with an additional loyalty counter on it if it’s a planeswalker, and it isn’t legendary.{flavor}It can transform into anything. When it sleeps, it changes into a stone to avoid being attacked.{Lns}