For context these are 2 nodes in the Spellblade passive tree with the following descriptions:
The “bug” is around the text “And the spells triggered from their trees”. This, to me, sounds like if I use a melee attack that costs more than 10 mana, the damage of any spells proc’d by the melee attack that is inside its tree should gain the benefits of the 150% increased elemental damage from Volka’s and 150% More elemental damage from Bladeweavers assuming we have 10 points in each node and we have 10 bladeweaver stacks. And if the spell is equippable then we wouldnt see the increase from Bladeweaver as per its alt text.
However, for example, with surge, a melee elemental attack with a 25 mana cost, none of the following spells in its tree will benefit from these passives. The possible spells are Static that casts on arrival, Lightning blast during and on arrival, Fire aura stacks on use and spark charge on hit. I tried all of these and none of them gained any additional damage from the passives.
I also tried some other melee attacks too, such as flamereave casting fireball and a firebrand costing with its own cost above 10 mana casting the fire wave spell on the right of its tree. There was no increase in damage for the spell using the passives.
The nodes seem to work in 2 cases that I found, one is tidal wave in the bottom right of surges’ tree, and the other is ice spikes for shatter strike. There seems to be both the damage increase from Bladeweaver and Volkas being applied in both cases.
I did try fire aura converted to cold or not converted at all to check if it was the element for some reason, but it did not change the results.
Video showing Fire Aura - Last Epoch - Volka's Razor and Blade Weaver bug - YouTube
Video showing Spark Charge - Last Epoch - Volka's Razor and Blade Weaver bug - part 2 - YouTube
Video showing Tidal Wave - Last Epoch - Volka's Razor and Blade Weaver Working - YouTube
The alt text on Bladeweaver would explain why lightning blast, static and fireball don’t work as they are “equippable” if the alt text is also applicable to Volka’s. So maybe that text is just missing from Volka’s as it doesn’t have any alt text for these interactions.
However fire aura/spark charge in surges tree should still work as far as I understand just like tidal wave on surge or ice spikes on shatter strike as they both have spell tags as well and are triggered from the trees and are not equippable spells. My only thoughts is that these can be proc’d from other sources, not just from the tree of surge? But even then my expectation would be that only the spark charge/fire aura from surge would get the damage benefits, other sources of the same spell would not get the increase in damage.
If I am misinterpreting how these nodes work I apologise, I wouldn’t be surprised if I managed to do that!