You've died once, it cant feel much worse. Can it? You cannot feel pain, through magical effects or standard pain. Additionally, once per long rest, if you would fail a constitution saving throw that is not a death save, you may succeed, and take no damage or adverse effects from it. 

...I mean you died. You cant get away scott free from that. You are missing a limb, important organ, some kind of sense that affects your roleplay as well as mechanically. Speak with your dungeon master about possible mechanical difficulties, or roll on the major injuries table if you need ideas!

When youve died and seen what your fate is to be... it leaves a permanent mark. You have immunity to all necrotic damage, and vulnerability to radiant damage. Effects that target undead work on you as well.

You may have died, but coming back hardened your bones and flesh to a much better degree. Your Constitution score increases by 2, and your Strength score increases by 1.

You were once a living humanoid of some kind, and that cant be forgotten due to your form. You retain all the speeds you may have had from your original form, and none of the skills or traits. 

Death doesnt take kindly to being cheated, and she is certainly a cruel mistress. You'll return in time, but she will make sure its as soon as possible. You have disadvantage on all death saving throws.