So, I found the crystal and the class master (not in that order, funnily), mastered the class, got the seal. Is there not a mastery armor to trade the seal for, or did I not find the NPC for it?

Neat class, btw. Love a class that can support more than one or two builds.

The locations work perfectly. :) Not too difficult to get to, but easily miss-able, which fits in with the base game crystals for later classes.

Feel free to let me know if this crystal location feels sufficiently placed! I appreciate the feedback :)

Near the literal "key" item in the caves that you need 3 of; specifically near the elevator to the pipeline. You head west from the shrine to get there.

Do you mean where the Salmon Violin is found? I wasn't sure if that's what you meant by key item. I agree that the jungle would be a great idea though!

Unsolicited feedback, but the jungle would probably be a good area to put the crystal. Specifically, in the cave system near the elevator, where you also get a key item. (I'm trying to avoid too many spoilers). It's a fairly advanced class and that's thematically appropriate with the skill names.

Thanks so much for letting me know! Just dropped a hotfix; I appreciate it!

The Druid's first ability on the right (by method of elimination: Rejuvenate) is not learned at start, has no LP cost, and is un-selectable. That locks out the entire support side of the skill tree. The game says it is not available. That has so far stopped me from using the Druid, as I want to be able to use the entire skilltree.

Otherwise the abilities look interesting and I appreciate your combining of niche abilities from other classes, like the target stat being the average of defense and resist.