({4} magic symbol) ({U} magic symbol) each turn available.
Steps
During an opponent's turn, after their untap step, activate Verity Circle by paying ({4} magic symbol) ({U} magic symbol) , tapping target creature an opponent controls without flying.
Verity Circle triggers, causing you to draw a card.
The Watcher in the Water's first ability triggers, creating a 1/1 Tentacle creature token.
When the Tentacle enters the battlefield, Junk Winder triggers, tapping target creature an opponent controls.
Repeat from step 2 for each remaining creature opponents control.
Repeat from step 1 after each of your turns.
Results
Creatures opponents control do not untap during their controller's untap step.