Two teams working independently in separate projects up to now, but want to now work together. Some issues from one project need to be dragged and dropped into epics from another . Issues of low priority need to disappear automatically when they are dragged into DONE column. Scrum boards do not have sub-filter which is needed to meet the second requirement, column constraints do not make issues disappear, only add min/max values. CORRECT! JQL in the Kanban board sub-filter, which is only available in the kanban boards can be written to make issues disappear from the done column automatically. Additionally you can enable the Epics panel to allow users to drag and drop issues into Epics across projects.