Darigaaz, the Igniter is a rare Legendary Creature — Dragon card from Invasion (INV), collector number 243. Current market price: $2.12 (foil $167.59), 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.