Whenever you cast a Kobold spell, you may pay . 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.
Rohgahh turns Magic's iconic free 0/1 Kobolds into a relentless token engine: anthem them into 2/2s, generate 4/4 flying Dragons every time you cast a Kobold (paying ), and spit out more Kobolds whenever you cast a Dragon. You flood the board for free, then convert that army into damage via burn payoffs, aristocrats, or a wide alpha strike.
Free Kobold spells (mana value 0) make Rohgahh's Dragon engine extremely mana-efficient once he's out
Two-way token loop scales fast, giving you both go-wide bodies and evasive 4/4 fliers
Cheap creatures pair perfectly with Skullclamp, sacrifice outlets, and ETB-damage payoffs
Aristocrats and burn finishers give multiple non-combat win angles
Almost entirely dependent on Rohgahh; without the commander your Kobolds are vanilla 0/1s and the engine stops
Highly vulnerable to board wipes given how invested you are in the battlefield
Commander tax and repeated removal can choke the deck since Rohgahh costs 5
Limited interaction in BR means you can struggle against combo and control
Makes Treasure when your sacrificed Kobolds die, refunding mana to keep casting and paying the .
Add fast mana and protection (Sol Ring, Arcane Signet, Lightning Greaves) so Rohgahh sticks and the payments come easily, plus recursion like Feldon of the Third Path or Phyrexian Reclamation to rebuild after wipes. Layer in more 'enter the battlefield' and 'dies' payoffs (Terror of the Peaks, Mayhem Devil, Goblin Bombardment) and a free sacrifice outlet to make the token flood lethal in one turn. To push higher, lean into Skullclamp-driven card draw and a Pitiless Plunderer/Treasure loop to chain Kobold and Dragon casts explosively.
Legendary Creature — Kobold Warrior
. If you do, create a 4/4 red Dragon creature token with flying.