The shield, Svalin, dropped from the last boss of the Aery. The tank, Myfirst Yourface, wanted it for glamour, so I told him/her to go for it and left the instance, expecting my roll to automatically switch from Greed to Pass. Instead he/she rolled just before I exited and I ended up winning the Greed.

It's a silly mistake over a low-level item, but I feel bad about the mixup. I'm here to offer him/her to farm the dungeon together for that shield.