Proposal 
Sorcery
Allows Richard to propose marriage to Lily. If the proposal is accepted both players win; mix the cards in play, both libraries, and both graveyards as a shared deck.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL