Munda, Ambush Leader
The Ally engine that turns a tribe of bodies into a stocked deck. Allies were built around the rally trigger, a battlefield word that fires whenever one of them enters, and most of the cycle's leaders cashed that trigger for a stat boost or a token. This one cashes it for card selection: every Ally that arrives lets you dig four deep and stack the top of your library with more Allies, dumping the rest to the bottom. The structural cleverness is that the effect compounds with itself. A single deployment triggers the rally, which finds the next two or three Allies, which trigger again as they enter, which find the next batch. A tribe whose payoff depends on going wide gets an engine that refills its own gas tank, smoothing the draws that make a creature-flood strategy live or die. Even its own arrival is part of the chain: rally is an enter trigger, so the moment this hits the battlefield it digs for the Allies that follow, and haste lets the 3/4 push damage on the same turn rather than waiting to be answered. What keeps it from running away is that it only filters, never draws; you reorder your library but your hand size never changes, so the engine accelerates a deck already built around the type line rather than generating advantage from nothing.
