Spit Flame 
Instant
Spit Flame deals 4 damage to target creature.
Whenever a Dragon you control enters, you may pay . If you do, return this card from your graveyard to your hand.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL