Double Dip 
Instant
Choose another player. You gain 5 life. At the beginning of the first upkeep in your next game with that player, you gain 5 life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL