Elysium, the Holywyrm

Flying, Indestructable
Whenever Elysium, the Holywyrm attacks, you
may pay {w}{u}{b}{r}{g}. If you do, put a Dragon
card from your hand onto the battlefield tapped
and attacking.
Other Dragons you control get +1/+1.
—
"Rest in peace, Ilia, and know the salvation of the
world begins now."
-Elysium