Thought exercises, however, are quite healthy, both for those of us on the RC and folks who like to think about the format
Card draw on both sides of a card, of course
Its similar to Orcish Bowmasters, where someone clearly wanted to push back against rampant card advantage, but overtuned the answer and produced something that needed to be banned from the format it was created for
Containment Construct This one absolutely has implications for high-powered play
Creature - Rat Peasant Old Flitterfang Flying At the beginning of each end step, if a creature died this turn, create a Food token
Aerith Gainsborough - 519 Aerith Gainsborough is a deceptively powerful engine for life gain and +1/+1 counter strategies