I know that there are other threads about this, but with all these new NPCs that can use Synthsheaths, and the possibility of more, there need to be more that are obtainable so that it isn't necessary to pick and choose which NPC or if your PC gets one. Especially since Tuuva can get one and she's a very late-game NPC, so it's harder to give her one if you've already given out two in your game.
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