You don't lose unspent red mana as steps and phases end. Magecraft — Whenever you cast or copy an instant or sorcery spell, discard a card, then draw a card. If this is the second time this ability has resolved this turn, Ashling, Flame Dancer deals 2 damage to each opponent and each creature they control. If it's the third time, add {R}{R}{R}{R}.
NM-Mint Foil - $6.90
Lightly Played Foil - $6.60
Moderately Played Foil - $6.20
Heavily Played Foil - $5.50
Damaged Foil - $4.50
NM-Mint Foil Non English - $6.90
Lightly Played Foil Non English - $6.60
Moderately Played Foil Non English - $6.20
Heavily Played Foil Non English - $5.50
Damaged Foil Non English - $4.50