Brallin, Skyshark Rider is a mythic Legendary Creature — Human Shaman card from The List (PLST), collector number C20-4. Current market price: $14.59, TCGplayer market prices via Scryfall.
Partner with Shabraz, the Skyshark (When this creature enters, target player may put Shabraz into their hand from their library, then shuffle.) Whenever you discard a card, put a +1/+1 counter on Brallin and it deals 1 damage to each opponent. {R}: Target Shark gains trample until end of turn.