Sage's Reverie is a uncommon Enchantment — Aura card from Commander 2018 (C18), collector number 72. Current market price: $0.51, 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.