Whip of Erebos

[DimirOverlord1300]

So if I have a {Whip of Erebos} and I have something with lifelink, say a {Vampire Nighthawk}, would the vampire do damage and then I gain 4 life because it has lifelink twice or do I still only gain 2?

[Lyriczulu]

I believe multiple instances of lifelink (among other abilities) do not stack.

Edit: here's the ruling
702.15e: Multiple instances of lifelink on the same object are redundant.

RESOLVED

[Agrus Kos, Enforcer of Truth]

So if I have a {Whip of Erebos} and I have something with lifelink, say a {Vampire Nighthawk}, would the vampire do damage and then I gain 4 life because it has lifelink twice or do I still only gain 2?

You only gain two life, multiple instances of lifelink don't stack.

[DimirOverlord1300]

Oh ok thanks

[Anoobass]

Yet we always have to mention {Armadillo Cloak}.  Not lifelink, so can be stacked with lifelink.  One of the few (if not only) card printed this way.

[Paraluke]

Well we do have to mention the ancestor of lifelink,  {Spirit Link}.

[Teysa karlov]

Yet we always have to mention {Armadillo Cloak}.  Not lifelink, so can be stacked with lifelink.  One of the few (if not only) card printed this way.

{Vampiric Link} does this as well