Equipment: Spell Capacitor

Use Full Action to charge, Bonus Action to Discharge. You create a temporary magical storage device that can hold one spell of level equal to character level or lower. When you cast the spell into the capacitor, you pay the WP cost, but the spell doesn't take effect. As a Bonus Action on your turn, you can discharge the capacitor, causing the stored spell to take effect without requiring additional costs. The capacitor lasts for 8 hours or until discharged.