Rohgahh of Kher Keep

Legendary Creature — Kobold {2}{B}{B}{R}{R} 5/5

At the beginning of your upkeep, you may pay {R}{R}{R}. If you don't, tap Rohgahh and all creatures named Kobolds of Kher Keep, then an opponent gains control of them. Creatures you control named Kobolds of Kher Keep get +2/+2.