Sevaron, the Seventh Titan

Flash, trample, indestructible
When Sevaron, the Seventh Titan enters the battlefield, untap up to 7 creatures and/or lands.
When Sevaron, the Seventh Titan leaves the battlefield, exile up to 7 permanents.
Sacrifice an Eldrazi: Exile target permanent.
Non-Eldrazi creatures get -1/-1.
Non-legendary Eldrazi creatures can't attack.
They just keep coming.