Draconic Fealty 
Sorcery
As an additional cost to cast this spell, you may behold a Dragon. Target player discards a card with the greatest mana value among cards in their hand. If a Dragon was beheld, exile that player's graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL