Herald of Slaanesh 
Creature — Demon
Locus of Slaanesh — Demon spells you cast cost less to cast.
Other Demons you control have haste.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Demon
Locus of Slaanesh — Demon spells you cast cost less to cast.
Other Demons you control have haste.