Immobilizing Ink is a common Enchantment — Aura card from Odyssey (ODY), collector number 87. Current market price: $0.11 (foil $0.57), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature doesn't untap during its controller's untap step. Enchanted creature has "{1}, Discard a card: Untap this creature."