Deadbridge Chant is a mythic Enchantment card from GRN Guild Kit (GK1), collector number 58. Current market price: $0.35, TCGplayer market prices via Scryfall.
When this enchantment enters, mill ten cards. At the beginning of your upkeep, choose a card at random in your graveyard. If it's a creature card, put it onto the battlefield. Otherwise, put it into your hand.