Dack Fayden is a mythic Legendary Planeswalker — Dack card from Mystery Booster 2 (MB2), collector number 80. Current market price: $1.54, TCGplayer market prices via Scryfall.
+1: Target player draws two cards, then discards two cards. −2: Gain control of target artifact. −6: You get an emblem with "Whenever you cast a spell that targets one or more permanents, gain control of those permanents."