Benthicore

The clever part is that this Elemental builds its own protection out of the bodies it makes. The two Merfolk Wizard tokens that arrive alongside the 5/5 are not incidental chump fodder; they are the fuel for the untap-and-shroud activation, and that loop quietly redefines what the card is for. Tap two Merfolk to untap and gain shroud, and a slow seven-drop becomes something that swings, then dodges spot removal and refreshes to block, all in the same turn cycle. The shroud is the wrinkle that matters most: because it is an activated ability you control, you can respond to a removal spell on the stack by paying the cost, gaining shroud, and fizzling the answer rather than racing it. What keeps the rate honest is the appetite of that ability. It demands two untapped Merfolk per use, so the Elemental is only as durable as the tribal board feeding it, and the moment those tokens die the engine stalls and the body sits there as a 5/5 that can no longer protect itself. That dependency scales the payoff with how committed the rest of your board is to the Merfolk plan: generous when the tribe is wide and inert when it stands alone. It is a creature built to be the top end of a go-wide deck, not a card you cast and hope survives.