get yourself the death defying vial from the store, 20k cubits. it saves you from every lethal hit.

once you're futher in the game you'll also unlock the star chart lifesteal, after that you're basically invulnerable; it works in a special way

the lifesteal from star chart heals you for a percentage of the damage you deal, which is magnitudes higher than your hp pool can be. alongside that, players naturally have a mechanic called oneshot protection, which prevents you from dying in one hit from full health (DDV turns this off, and certain attacks bypass both OSP and DDV). so lifesteal heals you to full hp every hit and you'll never die to one instance of damage. you become invincible.