You will need to move 3 to your Moder summoning spot(s) to summon her each time. Without friends to move them it can be a painstaking venture to take them one at a time. Some people use a secondary Seed with extra chests set there to store and move things rapidly that won't go through a portal. Like Dragon Eggs. And they do set well on the item stands to give off a pleasant violet light in a very limited radius.