Afterclap

This spell allows the caster to duplicate the damage suffered by a single creature in the previous round if they are in range. Damage is precisely the duplicated in type and amount - in other words, the same damage rolls, saving throws, and so on occur in the same way as in the previous round. The damage may have been caused by any source, not just magical attacks. For example, an evil fighter is struck by two arrows taking 3 and 4 points of damage, stabbed by a rogue with advantage taking 12 sneak attack damage, and makes a dexterity save against a wizards fireball taking 11 points. The next round the wizard casts Afterclap and the fighter takes 30 points of damage (3+4+12+11)