Crescent
is an on hit, with everything that means.
is not, proccing only with melee basic (and therefore doesn't interact with devourer, eve's e, and other such things)
I'm reporting this as a "bug" mostly because the item that builds into another item shouldn't be weaker once done as
can clear up the whole 'doesn't give lifesteal' with tiamat.
Just tested it in a ranked game, does work this way. Should be a minor fix (with whatever decision is made).