Aquamorph Entity

Most morph creatures resolve their hidden identity the moment you pay the cost: you know exactly what flips up, and so does anyone who reads the card. This one keeps the second variable live until the flip. The orientation is a replacement effect on enter-or-turn-face-up, so when the 2/2 unmorphs you read the board and choose 5/1 or 1/5 right then: a 5/1 to ambush a tapped-out attacker or shove through lethal, a 1/5 to wall a swing the opponent thought was getting through. Building it as a replacement rather than a trigger has a quiet upside: the creature never spends an instant as a 0/0 falling to state-based actions, because its body is locked to one of the two profiles the moment it arrives. That same replacement governs a plain hard cast too, so you can drop it as a glass cannon or a brick wall when the morph mind game is beside the point. The cost of all this freedom is fragility in both directions: the 5/1 dies to any stray point of damage, the 1/5 barely scratches anything. It is always exactly one specialist and never both, a Shapeshifter whose payoff is informational rather than statistical. The body you get is unremarkable; the value is choosing it after the opponent has already committed.