Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Creature - Mutant Fish Color tag templates(None) Etrata, the Silencer Etrata can't be blocked
Another concern is that he doesn't have any way to get damage through, but lots of other creatures don't have evasion and we still find ways to win games with them, so maybe that's not such a big deal
With the precedent set, lets move onto the Top 10
Fitting more into a Stax or control archetype, Kraum and Tymna help keep your hands full by locking down the board and protecting your commanders with a wide range of counter spells
I have played decks in Historic that try to win off the pile of zero-mana artifacts, with a little assistance from Emry, Lurker of the Loch