Yawgmoth's Agenda 
Enchantment
You can't cast more than one spell each turn. You may play lands and cast spells from your graveyard. If a card would be put into your graveyard from anywhere, exile it instead.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL