Darigaaz, the Igniter is a rare Legendary Creature — Dragon card from Duel Decks: Phyrexia vs. the Coalition (DDE), collector number 47. Current market price: $0.54, TCGplayer market prices via Scryfall.
Flying Whenever Darigaaz deals combat damage to a player, you may pay {2}{R}. If you do, choose a color, then that player reveals their hand and Darigaaz deals damage to the player equal to the number of cards of that color revealed this way.