The potion of restore ability can be used to recover lost maximum Pw. It only restores maximum Pw, not current: if your Pw is 30/80 and you previously had 100 maximum Pw, these potions will only be able to get you to 30/100.

• If cursed: does nothing (as usual)
• If uncursed: you recover one quarter the difference between your current maximum and your peak maximum, or 5 points, whichever is greater.
• If blessed: you recover half the difference between your current maximum and your peak maximum, or 10 points, whichever is greater.

The wand of magic missile should scale somehow, but explicitly not with wand skill, which may not even exist in a given implementation. Instead, its baseline damage remains 2d6, but your magical stats such as maximum Pw or skill in attack spells can increase its damage output.

The potion of gain energy has a minimum substantial percentage of your Pw pool that it will refill. Like healing potions, it will only increase your maximum Pw if you would have gone over your maximum.

Monsters can now zap cancellation at the player; effects of cancellation on the player include draining Pw (and possibly maximum Pw if Pw hits 0) and removing magical temporary intrinsics such as invisibility, speed, and detect monsters. It does NOT cancel the player’s entire inventory, as this does not happen when the player zaps cancellation at a monster.

Track your maximum reached HP and Pw (or maximum “external sources” HP and Pw if using a system where it mainly depends on a stat and XL) and allow restore ability to also fix these.

You get a small Pw boost (similar to newts, or perhaps not boosting max Pw)? by eating the corpse of a spellcasting monster.

Electric eel corpses increase Pw/maxPw to an extent greater than newts.