The Dark Magicians

Sacrifice one "Dark Magician" or "Dark Magician Girl"
+ one Spellcaster as an additional cost to cast this spell.
Whenever a noncreature spell is cast (after it resolved):
Draw 1 card.
If it was a noncreature spell, you may cast it instantly
without paying its mana cost.
(You can only activate this effect once per turn.)