In casual duels, it certainly can dominate quite ably, with the exiling of cards from the library being a more efficient method of milling, since they can't come back with reanimation or give someone threshold
Yawgmoth, Thran Physician Card draw, removal, and proliferation all wrapped into one
Find ways to get extra chorus counters, like by proliferating, and youll be rewarded handsomely
When you do, cast it for its madness cost or put it into your graveyard.) Whenever this creature attacks, discard your hand, then draw three cards
But it should you get the better half of a lord effect on the Human face, and once transformed, this card enters the top echelon of aggro enablers
There are more than 70 changeling creature cards available to put in a Morophon, the Boundless Commander deck, none of them are super expensive and most are less than $3, so don't tell me you can't build that shark or whale deck