Siv, Everlasting Mage

+1: Mislead 2, then gain control of any creature with 3 or more +1/+1 counters on it.
-2: Each player reveals the top card of their library. You may cast any number of spells from among those cards without paying their mana costs.
-8: Take two extra turns after this one. Then create two tokens that are copies of Siv, Everlasting Mage, except they're not legendary.