Jeong Jeong, the Deserter

two generic mana one red mana Legendary Creature — Human Rebel AllyPower and toughness2/3

Firebending 1 (Whenever this creature attacks, add one red mana . This mana lasts until end of combat.)

Exhaust — three generic mana : Put a +1/+1 counter on Jeong Jeong. When you next cast a Lesson spell this turn, copy it and you may choose new targets for the copy. (Activate each exhaust ability only once.)

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6 printings

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Jeong Jeong, the Deserter rulings

2025-10-02
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.
2025-10-02
Exhaust abilities can be activated any time you could normally activate an ability.
2025-10-02
You can't choose to pay any additional costs for a copied spell. However, effects based on any additional costs that were paid for the original spell are copied as though those same costs were paid for the copy too.
2025-10-02
Any other mana you add during combat will still be lost as normal when moving between steps of combat.
2025-10-02
The copy is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.
2025-10-02
If an exhaust ability of a permanent is activated, and then that permanent leaves the battlefield and returns to the battlefield, it becomes a new object so its exhaust ability can be activated again.
2025-10-02
If the spell that's copied has an X whose value was determined as it was cast, the copy has the same value of X.
2025-10-02
The copy will have the same targets as the spell it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can't choose a new legal target, then it remains unchanged (even if the current target is illegal).
2025-10-02
"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."
2025-10-02
If an ability triggers whenever you activate an exhaust ability, that ability resolves before the exhaust ability resolves.
2025-10-02
The trigger from Jeong Jeong's exhaust ability and the copy it creates both resolve before the spell that caused the ability to trigger. They resolve even if the spell is countered before the copy is created.
2025-10-02
Any choices made when the spell resolves won't have been made yet when it's copied. Any such choices will be made separately when the copy resolves.
2025-10-02
Firebending abilities aren't mana abilities. They use the stack and can be responded to.
2025-10-02
Multiple instances of firebending on the same creature trigger separately, each granting you the appropriate amount of mana.

Jeong Jeong, the Deserter keyword rules

Exhaust Rule 702.177

An exhaust ability is a special kind of activated ability. “Exhaust — [Cost]: [Effect]” means “[Cost]: [Effect]. Activate only once.”

An effect may allow you to take an action as long as you haven’t activated an exhaust ability this turn. Such an effect allows that action only if you haven’t begun to activate an exhaust ability this turn.