Cheapest priced copy (Avatar: The Last Airbender Eternal): $3.99 at Card Kingdom, near mint, their price list as of .
Iroh, Dragon of the West 
Legendary Creature — Human Noble Ally · 4/4 · Rare · Avatar: The Last Airbender Eternal · #119
Haste
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
At the beginning of combat on your turn, each creature you control with a counter on it gains firebending 2 until end of turn. (Whenever it attacks, add {R}{R}. This mana lasts until end of combat.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $3.49 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Eternal | 119 | Rare | $3.99 | $3.49 |
| Avatar: The Last Airbender Eternal | 194 | Rare | $4.49 | $3.49 |
5 rulings from Wizards of the Coast
- 2 October 2025"Firebending N" is a keyword that represents the ability "Whenever this creature attacks, add N {R}. Until end of combat, you don't lose this mana as steps end."
- 2 October 2025Multiple instances of firebending on the same creature trigger separately, each granting you the appropriate amount of mana.
- 2 October 2025Any other mana you add during combat will still be lost as normal when moving between steps of combat.
- 2 October 2025Mana from firebending abilities isn't lost until you leave combat and go to your second main phase. It can be used at any time during combat, even after combat damage has been dealt.
- 2 October 2025Firebending abilities aren't mana abilities. They use the stack and can be responded to.