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]
All characters, except Azazel, The Lost, and Tainted Lost, have this bone-pile form. They can be seen if Clicker is used as bone-pile Lazarus to turn into another character.
Upon dying, resurrect as 
Lazarus Risen in the current room with one Red Heart container and 
Anemic.
Upon dying, resurrect as 
Lazarus, with his inherent extra life effect.
Soul of Lazarus, 
1up!, 
Dead Cat, 
Inner Child, and 
Guppy's Collar.
Spindown Dice: Turns into 
Godhead when rerolled by Spindown Dice.
Tainted Lazarus / 
Dead Tainted Lazarus: Revived as Tainted Lazarus / Dead Tainted Lazarus correspondingly instead of Lazarus Risen.
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.
Tainted Forgotten being revived as 
Azazel, 
The Lost, and 
Tainted Lost, have this bone-pile form. They can be seen if 
Clicker is used as bone-pile Lazarus to turn into another character.
Revival Items 
Lazarus Unlocks 
Isaac (Boss) Unlocks 
The Binding of Isaac: Rebirth
