Primal Savagery targets two creatures.
Primal Savagery has a range of self, so you are one target, and it targets another creature, for a total of two targets. Since War Caster stipulates that the spell must target only one creature, Primal Savagery is ineligible.
Primal Savagery isn’t better than other War Caster eligible cantrips, so just let it work.
Yes, "anything" means "any object or creature" just as it does in the rest of the Player's Handbook.
The invisibility spell targets anything the target is wearing or carrying for as long as it is on the target’s person. The question many people ask is whether "anything" includes creatures. Based on the obvious interpretation of ...
Yes, you could make a Simulacrum of another creature, even an unwilling one. The spell doesn't require a willing target, saving throw or spell attack. Merely that the target is within touch-range for the casting.
You don't even need Wish for this; if you can somehow keep a creature in place for 12 hours you can already make a duplicate of an unwilling target....
spells require a clear path to the target. Any form of total cover prevents that. thus you cant do it
A target with total cover can't be targeted directly by an attack or a
spell, although some spells can reach such a target by including it in
an area of effect. A target has total cover if it is completely
concealed by an obstacle.
Yes, the ruling is different.
Twinned Spell states:
a spell must be incapable of targeting more than one creature at the spell’s current level.
So Twinned Spell is concerned not only with what the spell is doing right now, but also the full range of the spell's potential at this level. Even if a spell will target only one creature for the entire duration ...