Originally Posted by
dunklezhan
Perhaps it would appear as an 'additional' metamagic, with pre-reqs of empower then maximise, which would have the effect of applying one/both of these effects at zero spell cost, but doubling/tripling/quadrupelling/whatever the cooldown (and possibly taking the global 1 second cooldown on your other spells up to 2 seconds). You could then either just toggle them on, or do the right click thing on a spell by spell basis. This would allow you to drag an additional (for example) magic missile out, apply the new metamagics to just that and get a beast of a MM at no extra cost... but that has like a minute cooldown on it. Every now and again you get almost a free 'BOOM', but you can manage it alongside your other metamagic options. Or you can start a boss fight with it toggled on, let off every blast you have, then toggle off and go to normal spellcasting. if the fight lasts another minute, toggle and boom again. They're not free spells still, they're just not costing extra. You're effectively granting a bunch of extra spell points for a specific purpose - and with the spell point figures people who aren't me seem to be able to reach these days, that's not that powerful a thing to be giving out.
Or, simpler, just have a clickie with a 1 min cooldown, when you click it, the next spell you cast gets max/emp at no extra cost but doubles that spell's cooldown. Extra ranks (or core ablities) might reduce the cooldown (lets say 5 ranks, it could go from cooldown +100% down to +80%, +60%, +40%, +20%) but might instead apply to the next 2, 3, 4, 5 spells you cast. Have to be thought about more carefully by better minds than mine to make sure the 'cost' is not a hindrance on effectiveness.