Ashling, Flame Dancer

Once Ashling leaves the battlefield, you have until the end of the current step or phase to spend whatever red mana you have before you lose that mana as normal. There is no penalty associated with this other than the loss of the mana.

If an effect creates multiple copies of an instant or sorcery spell, Ashling's last ability triggers once for each copy created by the effect.

If a red mana you add has certain restrictions or riders associated with it (for example, if it was produced by the last ability of Arena of Glory), they'll apply to that mana no matter when you spend it.