Firebending 1 (Whenever this creature attacks, add . This mana lasts until end of combat.)
Lesson spells you cast cost less to cast.
Uncle Iroh is an aggressive Gruul midrange/ramp commander: attack to trigger Firebending for extra red mana that fuels big plays mid-combat, while leaning on cheaper Lesson spells for value and selection. You curve out creatures, swing in early, and use the Firebending mana plus discounts to overwhelm before opponents stabilize.
Free repeatable ramp every combat via Firebending, enabling explosive post-combat plays
Cost reduction makes Lesson spells efficient card advantage and utility in a usually card-hungry color pair
Cheap three-mana body that contributes to the board the turn it lands
Gruul gives access to elite ramp, haste enablers, and burn-based reach
Firebending mana only exists during combat, so it's awkward without things to spend it on mid-fight
Reliant on attacking, making it vulnerable to fog, mass removal, and blockers/Stax
Lesson synergies are shallow in red-green, limiting how much the second ability matters
No built-in evasion or protection, and the commander dies to any spot removal
Legendary Creature — Human Noble Ally
less to cast.