Traumatic Revelation (MOM-127) - March of the Machine

Target opponent reveals their hand. You may choose a creature or battle card from it. If you do, that player discards that card. If you don't, incubate 3. (Create an Incubator token with three +1/+1 counters on it and ": Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)