1. You need to clear of floors in Babel to unlock the Rune Slots. Each Rune has different attributes and the character attributes can be increased after inlaying.
2. There are 5 qualities of Runes. The attributes increase in better quality Runes.
3. Consume Rune Essence to upgrade Runes. The amount consumed depends on the Rune Attributes, Rune Quality and Rune Level.
4. Runes can be recycled. The amount of Rune Essence obtained depends on the Rune Attribute, Rune Quality and Rune Level. The recycle interface will display all the Runes obtained.
5. Inlaid Runes can be replaced.
6. A Rune has set attributes, some Runes are part of a set and can activate set attributes. Click the set overview on the upper right to view all the rune set attributes.
7. Click the Rune overview on the upper left to view all the Runes and obtaining conditions.