What the achievement asks
Hand a hundred Anima-Bound Wraps to Summoner Gerard, to help summon Visectus. Five points, account-wide.
An hour of crafting, once you can craft them at all. Getting to that point is where everyone stalls.
The blocker nobody documents
The wrap recipe needs Abominable Stitching at rank 2 and the Anima Conductor at rank 1. Rank 2 alone is not enough, and nothing in the game connects the Anima Conductor to a stitching recipe.
People spend days pouring anima into the Stitchyard, get it to rank 5, and still see no wraps on the table. Build the Anima Conductor and the recipe appears immediately.
Making them
A hundred wraps takes a hundred Shrouded Cloth, one each. Craft them at the Abominable Stitching Table.
The progress bar is not yours
Visectus has a summoning bar under him that every Necrolord in the zone contributes to, so it can fill without you.
That does not matter. The achievement counts what you personally handed over, and it wants a hundred from your own hands. If the bar completes and Visectus is summoned while you are at sixty, keep going.
Visectus has been reported despawning immediately after being summoned. That has no bearing on this achievement, which is about the contribution rather than the fight.