Arcavios, Realm of Knowledge

Instant spells cost {1} less to cast.
Sorcery spells have flashback (the flashback cost is
equal to the mana value plus {2}.
Enchantment spells can't be countered.
—Whenever you play a non-creature spell, roll a
d6:
•1: Scry 2. Draw a card.
•2-5: Nothing!
•6: Add {w}{u}{b}{r}{g}