Iron-Will Mage

Affinity for Arcane (This creature costs 1 less for
each Arcane you control)
If you control a Spellbook, this creature does not
have to tap for any reason including abilities
If you control a Scroll or cast one as an instant or sorcery this creature does not have to pay mana
for any reason including abilities until end of
turn (If it's a Scroll permanent this is a permanent
effect.)
{5}, {t}: put target instant or sorcery spell
in your graveyard into your hand