Drowned Rusalka

A repeatable sacrifice outlet welded to a rummaging effect, built for decks that want both halves of the bargain on a single activation. What it converts any creature into is a death trigger and a card filter at once, two distinct jobs sacrifice-matters strategies usually pay for on separate permanents; the Spirit attached to the ability is just the vessel. The fodder you feed it becomes selection (pitch a flooded land, dig toward the missing piece), but the design's real value lives in what it manufactures: a creature dies to fuel the activation, and the discard-then-draw can deliberately bury something you would rather raise from the graveyard than cast from hand. The discipline is the blue mana attached to every use, which keeps it from grinding for free the way a manaless outlet like Viscera Seer or Ashnod's Altar can; here you spend a card, a creature, and a mana to dig one card deep, so it rewards a deck overflowing with expendable bodies rather than one rationing them. The pattern has aged into a niche enabler: too slow to threaten a clock, too specific to slot anywhere that does not already care about both the act of sacrificing and the contents of the bin at the same time.