Omnath, Locus de mana {2}{G}

Créature légendaire : élémental

Vous ne perdez pas le mana vert non dépensé au moment où les étapes et les phases se terminent.

Omnath, Locus de mana gagne +1/+1 pour chaque mana vert non dépensé que vous avez.

Aussi sauvage et indomptable que le Roulis qui l'avait vu naître.

1/1

Illustrated by Alex Dos Diaz

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Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
You can keep unspent green mana indefinitely while Omnath is on the battlefield. That means if you add a green mana during one step or phase, you can spend it during a later step or phase, or even a later turn. Other types of mana will be lost as normal as each step and phase ends. (2010-03-01)
If a green mana you produce has certain restrictions or riders associated with it (for example, if it was produced by Ancient Ziggurat), they'll apply to that mana no matter when you spend it. (2010-03-01)

Once Omnath leaves the battlefield, you have until the end of the current step or phase to spend your unspent green mana before it too is lost as normal. There is no penalty associated with this other than the loss of the mana. (2010-03-01)