Eidolon of Countless Battles

Two of the oldest white aggro payoffs, wide boards and stacked Auras, get folded into one card here, and the trick is that it counts both for itself and for whatever it bestows onto. Cast for its mana value, it scales with your team and your enchantments; bestow it, and the enchanted creature gets the same doubled bonus while the Eidolon itself counts as an Aura you control, feeding its own math. That self-referential loop is the design's cleverest knot: every additional Aura, including this one, raises the bonus it grants. Bestow is what makes it durable against removal. A creature buffed by an Aura normally trades down when the host dies; here, kill the bestowed-onto creature and the Eidolon detaches and becomes a creature in its own right, still carrying its full count-based pump. It refuses to be a two-for-one for the opponent. The 0/0 base never actually puts it at zero: because it counts itself among your creatures, an Eidolon alone on an empty board reads as a 1/1 and stands up on its own, then grows with every body and enchantment you add. In a deck built to flood the table, it is the threat that turns a wide-but-shallow board into lethal. The lineage is the old white-weenie anthem given a single-body, recursive shape, rewarding the same overcommitment those decks already wanted to make.