Iria, the Energized

Haste
{1}{r}, {t}, Discard a card: Iria deals 3 damage to
any target. Put a +1/+1 counter on her.
{5}{r}{r}, {t}, Exert Iria: Remove all +1/+1
counters from Iria. She deals damage to target
player equal to the number of counters removed
in this way and 1 damage to each creature and
planeswalker that player controls.