Million-to-One Chance

Counts as Rootborn Defenses
Populate. Creatures you control gain indestructible until end of turn.

"So it'd only work if it's your actual million-to-one
chance," said Colon.
"I suppose that's right," said Nobby.
"So 999,943-to-one, for example—" Colon began.
Carrot shook his head. "Wouldn't have a hope. No
one ever said, 'It's a 999,943-to-one chance but it
just might work.'"