Invasion Submersible

A Vehicle that lands as a potential tempo swing and only later decides whether it wants to be a threat. The enters trigger is optional and targeted: return up to one other nonland permanent to its owner's hand the moment it arrives, no crewing or activation required. Everything after that is contingent. It shows up as a 0/0 with no printed way to attack until the exhaust ability fires, and that conversion is a one-shot (each exhaust ability activates only once) rather than a repeatable flip switch. The waterbend mechanic reshapes how you pay: you chip at the by tapping artifacts and creatures you already control, each worth , so an established board turns the Submersible on cheaply while a stalled one leaves it inert on the table. Once it converts, three +1/+1 counters make it a 3/3 artifact creature that keeps the bounce value already banked on entry. The structure splits the payoff cleanly across a resource line: the tempo is free and immediate, the beater is bought once and never again. That poses a single question, whether the card stays a landed value trigger or becomes a threat you sink a whole activation into, and because the exhaust never comes back, it refuses to keep offering the choice.