Is there a spell out there that can detect invisibility? So far I have Wyll in my party and I use the hunger spell to prevent him from going invisible which sort of helps with fighting him but would like to know if there are additional/better options to follow.
There is a See Invisibility spell as well as a magical eye from Volo and potions that grant See Invisibility. But they're not particularly great given that they don't work right and instead of seeing invisible things they just make invisible things roll a DEX save at the start of your turn if you're close enough to them...
The best ways to deal with invisibility are AoE effects. Notable are things like Create Water (Or throwing bottles of water), Spirit Guardians (Especially with any Radiant Orb generating items) and Sleet Storm.
Any AoE's will do, but things that hit a large area and always affect targets (I.e. No save to nullify them) work best.
