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 deals 2 damage to each opponent and each creature they control. If it's the third time, add {R}{R}{R}{R}.
Near Mint - $3.50
Lightly Played - $2.80
Moderately Played - $2.40
Heavily Played - $2.10
Damaged - $1.70
Near Mint Spanish - $3.50
Lightly Played Spanish - $2.80
Moderately Played Spanish - $2.40
Heavily Played Spanish - $2.10
Damaged Spanish - $1.70