Teval, Arbiter of Virtue 
Legendary Creature — Spirit Dragon
Flying, lifelink
Spells you cast have delve. (Each card you exile from your graveyard while casting those spells pays for 
.)
Whenever you cast a spell, you lose life equal to its mana value.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL