Delphia, Undecided is a mythic Legendary Creature — Elephant card from Unknown Event (UNK), collector number MZ02. Current market price: $25.00, TCGplayer market prices via Scryfall.
Spells you cast cost {3} less to cast if they were originally printed in the following expansions or associated commander decks, depending on who won the Unknown event on February 18th, 2023: Mirran Victory — Mirrodin, Darksteel, Fifth Dawn, and Scars of Mirrodin. Phyrexian Victory — Mirrodin Besieged, New Phyrexia, All Will be One, and March of the Machine.