Shaper Parasite

Most morph creatures are gambits about a body waiting to grow; this one weaponizes the flip itself as a one-shot combat trick. The split is what makes it sharp: +2/-2 reads as pseudo-removal against anything with two toughness, while -2/+2 shrinks an attacker below lethal or rescues your own blocker by buying it the toughness to survive. The wrinkle is in how the effect actually arrives. Turning the card face up does not use the stack, so opponents cannot stop the unmorph itself, but the "when this creature is turned face up" ability is an ordinary triggered ability that goes on the stack and can be responded to before it resolves. That gap matters: you flip in response to a block, the trigger goes up, and the modal pump-or-shrink settles combat math a beat later, with a window for the opponent to react. The cost of the trick is paid in two installments and telegraphed by a face-down 2/2 sitting on the board, a known unknown that threatens either half of a combat equation and forces the opponent to play around both. Pointing the -2 toughness mode at an opposing creature is the clean removal line; the -2 power, +2 toughness mode is the quieter use, blanking an attacker's damage to save a blocker or absorb an alpha strike. Few morphs from that early period interacted this honestly, when the mechanic was still being pushed past the vanilla flip-into-a-finisher template.