Dual Unsummon

Whenever a nontoken creature enters, its controller creates a token that's a copy of that creature. Whenever a nontoken creature leaves the battlefield, exile all tokens with the same name as that creature. When this enchantment leaves the battlefield, exile all tokens created with this enchantment.

Any player may cast creature spells with mana value 3 or less without paying their mana costs and as though they had flash.

When this creature enters, return target creature to its owner's hand.