Ohroahdia

If you were to lose the game, you may choose to instead pay this spell's mana cost using only {g} as the neccessary color between the variety
that was available normally of {w} or {u}, and if
you do, you may sacrifice a land and if you do
you can't lose the game until Ohroahdia leaves
the battlefield.
{w}{u}: Ohroahdia gains hexproof until end of turn.