"Damaging a monster steals 20 health... " ... unless that damage is gromp passive, or sunfire, or something other than strictly basic attack or ability damage.
Might actually help a few non-aoe blue-side champs if this item actually did what it says.
Jungle Lux God1 votesThis would help out a whole lot of champions if it did what it said.
In particular it might help Heimerdinger in the jungle because his turret's basic attacks don't apply the Talisman passive. It doesn't always affect too much because the beam still applies the passive and the turrets target the unit Heimer most recently attacked, but when Heimer is leaving a camp's range to go to another camp it would help so much if the turrets could apply the passive, especially if Heimer wants the turret to die before he moves on.
GetMariahCarried1 votesI'd be shocked at the thought of dongerjungle, if I wasn't more shocked that I even have to redact my "it procs on ability damage" comment. Really Riot? It doesn't even proc on Heimer turrets? Let me guess, it doesn't work on nid traps or shaco boxes either?
I bet the talisman passive was designed as both an on-hit/spell effect. Heimer turrets don't proc spell effects, like crystal scepter's. Hence my theory. Soooo I guess Riot somehow forgot that not every form of damage procs either on-hit or spell effects... ... How...
Jungle Lux God1 votesI was also thinking that it applies as both an on-hit and a spell effect too, and does not apply on "proc effects", which is what stuff like the Sunfire Cape passive is classified as.
Weathered1 votesGetMariahCarried1 votes"Health steal increased to 25 over 5 seconds from 20" aaaand does that now apply on gromp/sunfire passive damage?
ThePurpleKnight1 votesI tested it today and ended up finding a Shyvana visual bug while doing it. Anyways that aside: the results.
Does Talisman do additional damage?
Yes, when hitting the krug I got it from 1400 down to like 1357 or something the first hit and then down to like 1318 without any items (rough numbers I don't remember exact values)
Upon buying Talisman I ended up getting it the same for the first hit but during my second hit the number changed, I determined that Talisman gives roughly 2 damage per second whenever you damage a monster, but not on the second that the damage hits, it will be applied on the following second.
It's such a small number that it basically doesn't matter, but it does indeed steal hp.
GetMariahCarried1 votesIt's 20 health-steal over 5 seconds, which translates to 4 per second. Either your numbers are off, or Riot's talisman is bugged. Monsters only have 10 magic resist, and I don't think that health-steal even counts as magic damage.