The War Caster feat gives the ability to cast certain spells as reactions, which creates some ambiguous rules. So far I've found:
- Command: the spell states that the creature must do a specified action on its next turn...does that mean in this case the spell would have no immediate effect, instead waiting for the creature's next turn to come around? Or is it the way I hope it is, where my opportunity attack can cause them to drop to the ground and end their turn immediately?
- Thorn Whip: where can I pull them to? Can I move them to the opposite side of me?