Uncle Iroh — ruling 1

Mana 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.

Uncle Iroh — ruling 2

Firebending abilities aren't mana abilities. They use the stack and can be responded to.

Uncle Iroh — ruling 3

"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."

Uncle Iroh — ruling 4

Any other mana you add during combat will still be lost as normal when moving between steps of combat.

Uncle Iroh — ruling 5

To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.

Uncle Iroh — ruling 6

Multiple instances of firebending on the same creature trigger separately, each granting you the appropriate amount of mana.

Uncle Iroh : règles, fonctionnement et interactions (MTG)

Uncle Iroh is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Firebending 1 (Whenever this creature attacks, add . This mana lasts until end of combat.) Lesson spells you cast cost less to cast.

How it works : Uncle Iroh

Original English text — Wizards of the Coast / Scryfall

#1October 2, 2025· Wizards of the Coast
Mana 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.
No other card is named in this ruling.
#2October 2, 2025· Wizards of the Coast
Firebending abilities aren't mana abilities. They use the stack and can be responded to.
No other card is named in this ruling.
#3October 2, 2025· Wizards of the Coast
"Firebending N" is a keyword that represents the ability "Whenever this creature attacks, add N . Until end of combat, you don't lose this mana as steps end."
No other card is named in this ruling.
#4October 2, 2025· Wizards of the Coast
Any other mana you add during combat will still be lost as normal when moving between steps of combat.
No other card is named in this ruling.
#5October 2, 2025· Wizards of the Coast
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
No other card is named in this ruling.
#6October 2, 2025· Wizards of the Coast
Multiple instances of firebending on the same creature trigger separately, each granting you the appropriate amount of mana.
No other card is named in this ruling.