Osiris, master of vex

+2: Create 2 vex tokens, a 0/1 that says: sacrifice this creature, add 1 mana of any color. And a 1/1 that says sacrifice this creature draw a card
-3: Exile target permanent, Draw cards equal to the cards converted mana cost
-8: You get an emblem with: " If you've cast 3 or more spells this turn take an extra turn after this one.