Hi!,
The other day I was doing some dungeons for the Undaunted Celebration, at one of those I noticed a player who had a proc I dont know if it was a skill or an ability proc, it added randomly a blood and bones effect over dead NPC's, not just humanoids but even animal creatures, the run was so fast, so I couldn't get to know what it was. I add a screenshot of it. Please to anyone who knows what skill, ability, gear proc, etc., is the following I show on the screenshot, in this case I noticed it the bloody and bones effect over a dead bear NPC, the effect last briefly and dissapear following the dissapear of the dead NPC, I will appreciate it a lot to know

Medieval