Hakbal of the Surging Soul

Explore was built as a small, self-correcting engine: reveal, take the land or grow, then decide whether the nonland card stays in place or goes to the graveyard. Building a Merfolk commander around it turns that one-creature trickle into a board-wide pump, because the trigger fires for every Merfolk you control at the beginning of combat, before attackers are declared. That timing is the whole point. The counters land while blockers are still theoretical, so a wide Merfolk board arrives at combat already bigger than it was in the precombat main phase, and the explores that hit lands smooth the draws that keep you deploying. The attack trigger closes the loop from the other end: a land drop when you are flooded, a card when you are not, so the engine rarely stalls on resource type. What makes the design coherent rather than just busy is that both halves feed the same axis. The combat-step explores reward a dense creature count; the attack trigger rewards swinging with the bodies those explores have grown. And the gamble is milder than it looks, because Explore never forces you to discard: reveal a nonland you want and it stays where it was for next turn's draw, with the counter as consolation. The tension is instead about tempo, whether you spend a turn's card selection sculpting your next draw or cash it into board presence, and Hakbal asks that question at the start of every combat.