The Realm Jumper

Indestructible, Protection from Everything
Legendary Convoke (Your legendary creatures
can help cast this spell. Each legendary creature
you tap while casting this spell pays for {1} or
one mana of that legendary creature's color.)
—
With everything you've heard about me, do you think
you have the power to command me? You can't stop
what I have planned, so don't even try, just
understand what I am, and what I'm doing.