Netharion, Charger of Storms

Haste
Whenever Netharion, Charger of Storms attacks,
create a Forerunner Role token attached to target
creature you control. (Enchanted creature gets
+1/+1 and has "At the beginning of your upkeep, sacrifice a Role attached to this creature and draw a
card.")
Instant and sorcery spells you cast cost {1} less to
cast and have overload {3}{u}{r} for each
Forerunner Role you control.