Hello. Looks like unity is bugged little bit. If iam wearing it and my follower can be killed i can be killed by anything by one hit. Even if i have 1 bil. toughness. I am running only T16 where i should be fine, but sometimes i am killed by one hit by corpse worm for example. So iam dead like 5 times in one rift. After that i tried another ring instead of unity and i am not dying anymore. Without unity i can run lvl 100 Grifts with zero deaths. Can some one test it pls? Thank you.
Not a bug.
I guess you are talking about your seasonal barb.
You forget to give a “cannot die” relic to your templar.
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Read it again pls 
I am not forget anything.
You are sharing the damage from your templar, you are helping him, not he helps you.
Ok that is make sense Thx for help.
Think of it this way:
- You and your Follower have the Unity Ring equipped (or you have it cubed).
- Your Follower does NOT have the "cannot die" token equipped.
- Your Follower is hit with 1 billion Damage.
- You take half that Damage = 500 million Damage + half the Damage you were hit with.
- You both die.
- You and your Follower have the Unity Ring equipped (or you have it cubed).
- Your Follower DOES have the "cannot die" token equipped.
- Your Follower gets hit for 1 billion Damage, but takes 0 Damage because of the "cannot die" token.
- You take half that Damage. Half of 0 is zero Damage + half the Damage you were hit with.
- Your Follower does not die and, hopefully, neither do you.
Simply put, you will always take 50% Damage with that setup.
Note: Other items can mitigate Damage even further.
Also Note: This is why Unity Rings are frowned on in groups. 
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