Odeth, Heart of Lightning

Whenever you cast an instant spell, put a charge
counter on Odeth, Heart of Lightning. Then
for every five charge counters on Odeth, copy
that spell and Odeth deals 1 damage to target
creature or planeswalker. You may choose new
targets for the copies.
{2}{r}, {t}, Discard a card: Return target instant
card from your graveyard to your hand.