Eldrazi of Light's End

When Eldrazi of Light's End enters the battlefield, create two 1/1 colorless Eldrazi Scion creature tokens with "Sacrifice this creature: Add {c} to your mana pool."
Whenever Eldrazi of Light's End attacks, you may exile target creature you control and target creature your opponent controls. If you do, return Eldrazi of Light's end to it's owner's hand.
"Night is it's backpack"