Jodah, Archmage Eternal
Legendary Creature — Human Wizard
Flying
You may pay 
rather than pay the mana cost for spells you cast.
"Chronicles across the ages describe Jodah. They likely refer not to one mage, but to a family or an arcane title." —Arkol, Argivian scholar
Yongjae Choi
Double Masters 2022 (2X2)
• #233Rulings
If you apply Jodah's alternative cost to a spell with {X} in its mana cost, X is 0.
(wotc • 2018-04-27)
If you cast a spell for which mana may be spent as though it were mana of any color, you may cast it for Jodah's alternative cost and still spend mana as though it were mana of any color.
(wotc • 2018-04-27)
Jodah's ability is an alternative cost to cast a spell. You can't combine this with other alternative costs, such as flashback. You can pay additional costs, such as kicker, in addition to this alternative cost.
(wotc • 2018-04-27)
Rulings
If you apply Jodah's alternative cost to a spell with {X} in its mana cost, X is 0.
(wotc • 2018-04-27)
If you cast a spell for which mana may be spent as though it were mana of any color, you may cast it for Jodah's alternative cost and still spend mana as though it were mana of any color.
(wotc • 2018-04-27)
Jodah's ability is an alternative cost to cast a spell. You can't combine this with other alternative costs, such as flashback. You can pay additional costs, such as kicker, in addition to this alternative cost.
(wotc • 2018-04-27)