Mesmerizing Dose is a common Enchantment — Aura card from Phyrexia: All Will Be One (ONE), collector number 62. Current market price: $0.27 (foil $0.24), TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, tap enchanted creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Enchanted creature doesn't untap during its controller's untap step.