Rowdy Research 
Instant
This spell costs 
less to cast for each creature that attacked this turn.
Draw three cards.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
This spell costs less to cast for each creature that attacked this turn.
Draw three cards.