It's a reason for the timetravel. The Hallows duplicated, changed their form a bit and are stuck to Harry, he can't get rid of them or even leave them in his rooms, they appear on him anyway.

Harry can't die. Everyone he loves is dying. The Elder Wand speaks. Everything is creepy and marvelous.

He said that he can't die and the Hallows will work only for him. The Mastery is a curse. It's not a focus of the story, though. Just a mention.

The story is very interesting, though. I like this Harry.

He talks with the dead using the Stone a lot. It's very good. We need more fics like that.

Every Harry Potter in every dimension is destined to be the Master of Death. He can talk with Death and has some dark almost accidental magic because of his Mastery. He can't die. After the troll incident he can speak with Death and does so frequently. Death is interesting and quite charming

Harry's not dead but not alive either. He feels strange, walks silently, he's cold. The ghosts are afraid of him. I really liked him saying "This is a grave." Creepy. Also his need to lie down in the earth and rest-- Brilliant.

Death takes him back in time to his birthday. They chat pretty often. If Harry dies, Death lets him drink tea in Death's "home" while He restores his body.

Harry passes on and talks with Death. Apparantly, he can't have afterlife.

Harry's not MOD here, he just summoned Death from Discworld. They chat.

Closer to the end, he accidentally collects all Hallows. Time stops (it was during a battle) and Death appears. They talk, Harry makes tea for the two of them, Death likes it, Harry proposes to meet each weekend for tea, Death agrees.

He uses the Stone to talk with the dead. Often.

Don't Fuck With Florists (They'll Fuck You Up)

He can talk with Death (and that talk was so fun). A Grim Reaper pretends to be one of his flowers.

later in the story Harry unites the Hallows and is able to resurrect the dead.