Energy Pull: Spell (5 any quanta)
You recover 2 HP per every creature in play.
Upgrades could sap attack power for one turn or permanently, or stall everything.
Strength Drain: Spell (7 any/Fire/Darknesse/whatever)
All creatures lose 25% of their attack power until the start of next turn, rounding down to a minimum of 2. You regain 1 HP per every sapped point.