"Core Set 2019", +m/(ca|do(es)?)n't\suntap/, +!exert (2)
Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.
Enchant creature
When Waterknot enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Gatherer works better in the Companion app!