Triton Cavalry

The heroic trigger here is pointed at a specific problem: the enchantment, the permanent type an entire block built its identity around. Where most heroic creatures cash their trigger into a counter or a combat buff, turning a targeting spell into board presence, this one converts the same act into tempo against a whole class of permanents, bouncing a god, an aura, or a stat-boosting enchantment back to hand every time you aim a pump or protection spell at it. The 2/4 body is the quiet enabler: four toughness means the cheap targeting spells that fuel heroic do not also have to keep the creature alive, so the bounce keeps firing while the Merfolk holds a ground stall. What limits it is that the trigger is parasitic on your own spells. It does nothing on an empty stack and rewards a deck already leaning on cheap targeted effects, so the enchantment-bounce is a bonus layered onto a plan you were running anyway rather than a standalone answer you can hold up. That makes it a build-around piece rather than a maindeck staple: in an environment thick with enchantments it is recurring disruption stapled to a heroic engine, and outside one it is a defensive body with a dead clause.