Does Fury of the Small apply the extra damage to each hit/attack, or only once per turn?
The goblin playable race (Volo’s Guide to Monsters, p. 119) has the “Fury of the Small” trait:
Fury of the Small. When you damage a creature with an attack or a spell and the creature’s size is larger than yours, you can cause the attack or spell to deal extra damage to the creature. The extra damage equals your level. Once you use this trait, you can’t use it again until you finish a short or long rest.
Say there’s a Goblin Fighter with Extra Attack; does the extra damage apply for every single attack, as each hit is dealing damage and they are all part of a single Attack action? Or is it only applied to one of the attacks during that action?
Likewise, a Goblin Warlock with max level eldritch blast; does the extra damage apply to each beam since the blasts are technically considered one spell cast? Or is it because you are making multiple spell attack rolls that they are each considered separate, and the damage only applies once?
Also, when casting an AOE spell, do all of the enemies hit by the attack suffer the extra damage added on by this trait, or must you simply pick one? Or, because it says when you damage a (meaning a single creature), you can’t activate it when you hit “multiple” targets?