Buyback

Buyback is a keyword ability on sorceries and instants that allows the player to pay an optional additional cost. If the player pays the buyback cost when playing the spell, buyback replaces the event of putting the spell into the graveyard upon resolution by instead putting it back in its owner's hand.

All tournament-legal cards with buyback were first printed during Tempest Block. One card, Capsize, was later reprinted as a Friday Night Magic promo in 2003.

From the Comprehensive Rules:

• 502.16. Buyback

• 502.16a Buyback is a static ability of some instants and sorceries that functions while the spell is on the stack. “Buyback [cost]” means “You may pay an additional [cost] as you play this spell. If you do, put the spell into your hand instead of into your graveyard as it resolves.” Paying a spell’s buyback cost follows the rules for paying additional costs in rules 409.1b and 409.1f–h.