Souldraining Touch

(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker.)
Each opponent loses 2 life, then deal 2 damage to
each creature they control. You gain life equal to
the total damage dealt this way. Creatures
damaged by this sorcery can't be regenerated.
Storm (When you cast this spell, copy it for each spell
cast before it this turn. You may choose new targets
for the copies.)