Troxon, Virtue of the Bulwark

Bulwark — When Troxon and at least two other creatures are blocking, creatures you control gain indestructible and lifeling.
Sacrifice Troxon, Virture of the Bulwark: Until
the beginning of the next end step, your life
total cannon drop below 1 and you cannot lose
the game.
"The wick of my candle is at an end. Carry the fires
of faith in my stead. Steward of the Knight's of
Deaths Door"- Narhallah's Dying Wish.