Samut, the Tested is a mythic Legendary Planeswalker — Samut card from Hour of Devastation (HOU), collector number 144. Current market price: $0.66 (foil $1.90), TCGplayer market prices via Scryfall.
+1: Up to one target creature gains double strike until end of turn. −2: Samut deals 2 damage divided as you choose among one or two targets. −7: Search your library for up to two creature and/or planeswalker cards, put them onto the battlefield, then shuffle.