Death Mask Ascendant

Your mummy form becomes almost complete. You are immune to poison damage and the poisoned condition, resist necrotic damage, do not breathe, eat, drink, or sleep, and have advantage on saves against charm, fear, paralysis, exhaustion, and decay effects.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.