Sage's Reverie is a uncommon Enchantment — Aura card from The List (PLST), collector number C18-72. Current market price: $0.28, TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, draw a card for each Aura you control that's attached to a creature. Enchanted creature gets +1/+1 for each Aura you control that's attached to a creature.