Establishment

Establishment is a Watcher rare power that reduces the cost of all Retained cards by 1 at the start of each turn for 1 energy. Since the Watcher has many Retain cards (Windmill Strike, Sands of Time, Perseverance, Protect, Flying Sleeves, Crescendo, Tranquility), Establishment synergizes broadly across the kit. A Retain card held for 1 turn costs 1 less; held for 2 turns costs 2 less, potentially becoming free. This creates powerful ramp: holding expensive Retain cards while cycling Calm turns them into cost-reduced powerhouses.

Establishment is a build-defining rare in Retain-heavy Watcher decks. With Sands of Time (4 cost), holding it for 4 turns while Establishment is active makes it free — then Wrath doubles its already massive 20+ damage. With Windmill Strike, each Retain turn also adds 4 damage while costing less. The synergy with Calm-cycling is perfect: you generate energy each Calm cycle and reduce Retain card costs simultaneously. Upgraded, Establishment reduces costs of Retained cards by 2 per turn instead of 1, halving the time needed to make expensive Retain cards affordable.