Defy Death

You gain the ability to temporarily ignore terrible wounds
and sustain your life through necromantic means. While
this spell is in effect, you do not fall unconscious if you
are at 0 hit points, and you do not need to make death
saving throws at the start of your turn. You must still make
a death saving throw if you take damage while at 0 hit
points. You are not killed until you have accumulated 5
failures.