Companion — No card in your starting deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)
: Add . This mana can't be spent to pay generic mana costs.
(17/04/2020)
Jegantha's companion ability compares the exact symbols in the mana costs of cards in your deck. If any one card has the same symbol twice, such as or {(r/g)}{(r/g)}, the companion condition isn't satisfied.
(01/06/2020)
Once you put your companion into your hand, it behaves like any other card you’ve brought into the game. For example, if it’s countered or destroyed, it’s put into your graveyard, remaining in the game.
(01/06/2020)
Wizards of the Coast has issued functional errata for the Companion mechanic. Instead of casting companions from outside the game: Once per game, any time you could cast a sorcery (during your main phase when the stack is empty), you can pay to put your companion from your sideboard into your hand. This is a special action, not an activated ability. It happens immediately and can’t be responded to. It can’t be countered or stopped by cards like Phyrexian Revoker. For more information please see https://magic.wizards.com/en/articles/archive/news/june-1-2020-banned-and-restricted-announcement
(14/04/2023)
You can spend mana from Jegantha's mana ability to pay for a hybrid symbol such as , but only if you choose to pay the colored mana component, not the generic mana component.
(17/04/2020)
A generic mana cost is usually represented by numeric mana symbols (, , and so on) and also . It is any cost requiring mana where that cost isn't , , , , , or .
