Rohgahh, Kher Keep Overlord is a rare Legendary Creature — Kobold Warrior card from Dominaria United Commander (DMC), collector number 41. Current market price: $0.27 (foil $0.36), TCGplayer market prices via Scryfall.
Other Kobolds you control get +2/+2. Whenever you cast a Kobold spell, you may pay {2}. If you do, create a 4/4 red Dragon creature token with flying. Whenever you cast a Dragon spell, create a 0/1 red Kobold creature token named Kobolds of Kher Keep.