Rohgahh, King of Kher Keep

When Rohgahh, King of Kher Keep enters the battlefield create X 0/1 red Kobold creature
tokens named Kobolds of Kher Keep.
Other Kobold creatures you control get +2/+2.
Sacrifice another Kobold: Add {r} to your mana
pool. Spend this mana only to cast Dragon
creature spells.