Say a character casts time stop on themselves. While the spell is active, they target another creature with a spell (thus ending the time stop). Can that targeted character make a reaction to the spell?
For instance, if the caster of time stop then cast finger of death at the enemy, could the enemy:
So, in order:
Counterspell, no. That would have to be done before the spell takes effect.
"Try to reduce the damage", depends. Consider shield: you use it after being "hit" by an attack, but if it turns the attack into a miss, then the attack didn't hit you, so you're still time-stopped and you couldn't have cast the spell. So no, you can't. On the other hand, absorb elements has to be cast after you take damage, which suggests it may work. That's right on the edge though; I could see a DM ruling that since it reduces damage from present and future attacks but not from the past, it logically must be cast before the damage happens.
Hellish rebuke, yes. It happens after the damage has been rolled and applied.
