I'm designing a homebrew warlock subclass with an ability that allows them to use an ability by expending spell slots. Does anyone know how to expend spell slots with an action or ability in the D&D beyond homebrew?
Not really; there are official class features that expend a spell slot as part of a class ability (e.g. Paladin Divine Smite), you just need to checkbox one of the spell slots of the appropriate level when you use them.
Now, if the ability you're creating also has a limited number of uses per short/long rest on top of expending a spell slot, you track that separately in your subclass feature.
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Helpful rewriter of Japanese->English translation and delver into software codebases (she/e/they)
I'm designing a homebrew warlock subclass with an ability that allows them to use an ability by expending spell slots. Does anyone know how to expend spell slots with an action or ability in the D&D beyond homebrew?
Not really; there are official class features that expend a spell slot as part of a class ability (e.g. Paladin Divine Smite), you just need to checkbox one of the spell slots of the appropriate level when you use them.
Now, if the ability you're creating also has a limited number of uses per short/long rest on top of expending a spell slot, you track that separately in your subclass feature.
Helpful rewriter of Japanese->English translation and delver into software codebases (she/e/they)
Thank you. I hope you have a nice day! ;P