There are 2 issues with upgrading the sigil for infernal hordes
first is a bug, as you can use the scroll to upgrade a level 8 horde sigil, the scroll gets used, surely the sigil not
I would expect a message, or at least a “non use of the scroll”
the other is usability
the sigils are on tab 2, if you activate the scroll , you always get pushed to tab 1 with items, so you have to go back to tab 2 and click on a horde sigil
at this point
why dont we get the removed tab in inventory, to store all sigils on one tab, and another one for all the boss mats…it gets more and more; and we dont get more space