Yuka, Time-Stilled Princess

Hexproof

If discarding a creature card would put it into exile rather than your graveyard, put it into your graveyard instead.
Whenever you discard a creature card, Yuka, Time-Stilled Princess deals damage equal to its mana value to target creature or planeswalker.

Discard a card: Regenerate Yuka, Time-Stilled Princess.