Upon dying, resurrect as Lazarus Risen in the current room with one Red Heart container and Anemic.
Upon dying, resurrect as Lazarus Risen in the current room with one less Red Heart container (but no less than 1), Anemic, and a permanent +0.5 Damage up.
Going to the next floor reverts him back into Lazarus, with his inherent extra life effect.
Birthright: Dying and reviving as any character will not give Lazarus Risen a damage boost; however, picking up Birthright as him will.
Plan C: Isaac can use Plan C on end-game bosses (e.g. Hush, Delirium) and survive, although, if going for unlocks, he will get Lazarus's post-it notes instead.
When Tainted Forgotten dies and respawns using this item, the resulting Lazarus Risen appears as a skin-colored pile of bones with Lazarus' head on top. This is purely visual and Lazarus Risen is still able to move and shoot as normal. This was originally a bug, but was left in because the developer Kilburn found it funny.[1]
Upon dying, resurrect as 
Upon dying, resurrect as 
Revival Items 
Lazarus Unlocks 
Isaac (Boss) Unlocks 
The Binding of Isaac: Rebirth
