Narset, Jeskai Waymaster 
Legendary Creature — Human Monk
At the beginning of your end step, you may discard your hand. If you do, draw cards equal to the number of spells you've cast this turn.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL