Needlebite Trap 
Instant — Trap
If an opponent gained life this turn, you may pay rather than pay this spell's mana cost.
Target player loses 5 life and you gain 5 life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL