Eerie Procession

A tutor priced for a deck that only existed for one block. Arcane was the spell-type glue holding together the splice mechanic and the spirit-and-arcane subtheme, and this fetches any of those cards directly to hand for three mana. The exchange is card parity, not advantage: you trade a card and the mana to convert it into a different, specific card. That trade only earns its keep when the thing you dig for chains into a payoff, which is why the design lives or dies on the breadth and power of the Arcane pool around it. In an environment thick with splice triggers, finding the exact piece that strings the rest together is worth the tempo cost. Strip that environment away and it is a slow consistency tax: a clean one-for-one that converts a dead-ish card into a relevant one, but a turn slower than just holding the card you wanted. What separates it from a general blue selection spell like Mystical Tutor is the type fence cutting both ways: it cannot grab your removal or your finisher unless those happen to be Arcane, so it behaves less like open-ended card filtering and more like a tribal search keyed to a single subtype. It is a consistency engine for a deliberately self-contained mechanic, and its ceiling is set entirely by how good the cards sharing that type happen to be.