The relic gate links are used to show which combination of keeps, when taken, will open a realm's relic gates. There are several styles for the Realm War Relic Gate Links that you can choose.
The links are normally invisible. When the links are enabled, you can toggle the visibility of the links by clicking on the relic gates in the Realm War window.
There is nothing shown when the links are concealed. The links are invisible with no graphics or controls to minimize the amount of memory used. Nothing will appear on the screen when you attempt to activate the links.
This style of links is also found in the Viddi UI.
This style of links is also found in the Ochi UI.
This style of links is also found in the X UI.