What would you say the Sorcerer Onis horn counts as?
Basically, what the title says. I've got a player whos thinking about playing an oni sorcerer. However, with certain spells and other abilities, they might multiclass depending on the character and how the story goes, we kinda need to make a ruling on what the onis horn counts as.
Does it count as an unarmed strike? As a natural weapon, that's not counted for an unarmed strike? (Yest that's a ruling) or as a natural weapon that can be used as an unarmed strike? Does it count as none of the above thus it's actually an improvised weapon? I know it's entirely used to cast spells, but certain spells and abilities buff weapons, and certain spells and abilities buff unarmed strikes.
Example, the paladin now has multiple valid smite spells, one can be used for unarmed strikes, while others can only be used via weapons.
I know the choice comes down to me in the end as the dm, but im curious to hear other people's ruling.