Rubina, Trickster's Ace

The Ace —Whenever Rubina deals combat damage to a player, surveil 1 and clash with that player. (Each clashing player reveals the top card of their library,
then puts that card on the top or bottom. A player
wins if their card had a higher mana value.)

Whenever you win a clash, draw two cards, create a Treasure token, and put a +1/+1 counter on Rubina.
Each opponent loses 2 life and you gain 2 life.

Whenever you lose a clash, discard a card. You lose 2 life.