Benevolence's Reward

Instant and sorcery spells you cast have "Gift a
card."

As you promise a gift for a spell, choose one —
• "This spell costs {2} less to cast."
• "This spell has hexproof and can’t be countered."
• "You may pay this spell’s mana cost as it
resolves. If you do, copy it. You may choose
new targets for the copy."
That spell gains the chosen characteristic.