At 13th level, a Mutagen Alchemist gains their Greater Field Discovery:
If you imbibe anotyher mu7tagen while you are under the effects of a mutagen that you created, you can gain the benefits and the drawbacks of both mutagens at once, despite the fact that they both have the polymorph trait and would not normally function together. If you come under the effects of any further mutagens while benfiting from two mutagens, you lose the benfit of one of the former mutagens of your choice, while retaining thge drawbacks of all the mutagens. If you are under the effects of two mutagens and you come under the effect of a non-mutagen polymorph effect, you lose the benfits of the mutagens while retaining the drawbacks of both.
While back at level 2, an Alchemist may gain the feat Revivifying Mutagen:
While under the effect of a mutagen, you can metabolize that mutagen's power to heal yourself. This uses a single action, which has the concentrate and manipulate traits. Once the action is complete, you regain 1d6 Hit Points for every 2 item levels of the mutagen (minimum 1d6), but the mutagen's duration immediately ends, even if you are under the effect of Persistent Mutagen.
If I am under the effect of two mutagens using Greater Field Discovery, and use Revivifying Mutagen, do I get to pick one of the two mutagens to metabolize? Or must I metabolize both? Do I get the healing from both?
At the moment, I would rule that you may choose, but figured it would be good to codify.
Anyone have any advice on this? I don't think allowing selectivity would be detrimental and frankly think it would enhance the idea of a Mutagenist who is able to make maximum use of mutagens for situational purposes.
Clearly, from RAW, you have to choose one mutagen. If you want to do it on your both mutagens, you have to use 2 actions.
I guess I was wondering if it might end up being ruled that using Revivifying Mutagen would consume *all* active mutagens rather than allowing selection of which mutagen, and allowing other mutagens to continue.
I think the current state of the rules is the best one. It allows you to switch mutagens very easily, and if you need a lot of healing, you can just use 2 actions.