Create Powerstone for Sorcery, Please Help

[Varyon]

Originally Posted by Kesendeja

Given the help here, and some from the GURPS Reddit, I've revised the spell. Please take a look and let me know how I should adjust it. Thanks.

Costs Fatigue is part of the Sorcery Limitation, so probably shouldn't be taken again, unless the intent is that a level 1 powerstone requires you to do two of Gestures, Speaking, and spending 1 FP (as usual) and then calls for spending 1 FP (so either Gestures+Speaking+1 FP, or one of Gestures/Speaking and 2 FP). Later levels should have Costs Fatigue applied to the Affliction, however, on account of it costing +1 FP per +1 ER.

You still have Permanent Duration at +50%. It should be +300% if it's not possible to dispel, but you don't need to account for the two separately.

I'm still not convinced No Resistance is legal, but given this is going to be applied to an object, I'd give it a pass.

Duration/Dispellability, Resistance, Costs FP, Requires Skill Check, Sorcery, Touch Only, and Requires Valuable Gem should only be applied to the Affliction, not to the ER. Duration/Resistance doesn't make any sense on ER, Costs FP would render it useless (you have to spend FP to make use of the functional FP stored within), Requires Skill Check would mean you have a pass a skill check every time you want to make use of the ER, ER's are basically treated as having the appropriate Power Modifier at no additional discount anyway (so no Sorcery), Touch Only doesn't make sense (the user of the gem needs to be touching it to use it, sure, but that's part of Affects Others), and Requires Valuable Gem doesn't make sense (unless you want the powerstone to need to be in contact with another gem to make use of the ER).

EDIT: Also, if you want Slow Recharge on the ER, you'll want to apply an appropriate Limitation on it (see Powers). Normally, it recovers at a rate of 1 per 10 minutes.