>>And I'm assuming that what used to be the free khri's (Hasten, Focus, Darken) now cost a slot too.
Yep. But since you'll have three by 10th, which is when you got all three for 'free' under the old system, it's kinda the same. Except you now have 1 from 1st to 4th, and 2 from 6th to 9th.
FGM Ricinus
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