Sorrowcoil Sisters

When an opponent discards a card, Sorrowcoil
Sisters causes 1 damage to that player.
When a creature an opponent controls dies, you
may pay {1}{b}. If you do, Sorrowcoil Sisters
targets a creature that player controls. It must
attack if able during the player's next attack
phase.
"Only those as wounded in heart as they are
from their sister's loss can hear their call."