Kumena, Tyrant of Orazca

The genius here is that the tap cost is paid by the very things the payoffs improve. Every Merfolk on the battlefield is both fuel and beneficiary: tap one to push damage through, tap three to refill, tap five to grow the whole board at once. That tension is the design problem the card resolves elegantly. Most tribal lords are static buffs that ask nothing and demand a wide board to matter. This one converts, turn by turn, whichever axis of the swarm you want: pressure, cards, or permanent size. Tapping creatures for evasion or draw means those bodies sit out the attack step, so the card forces a constant accounting of tempo against value, and the +1/+1 counter mode rewards patience by making the conversion permanent. It also folds the tribe's enabler and its finisher into a single 2/4 body, which is why it has anchored Merfolk strategies wherever the type runs deep. The deck wants to flood the board with small bodies anyway; this gives every one of them a second job. Note the asymmetry in the tap costs: only the unblockable ability specifies "another" Merfolk, so evasion cannot bootstrap off Kumena, but the draw and the anthem can both count Kumena among the creatures they tap. The abilities can be activated in sequence on the same turn if you have the creatures to spare, turning a saturated board into a card, an alpha strike, and a counter on everything in one accelerating sequence.