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.
Each of Rohgahh, Kher Keep Overlord’s last two abilities goes on the stack above the spell that caused it to trigger and resolves first. It resolves even if that spell is countered or otherwise left the stack.