You must be at least level 7 in the game to perform magic with runes.
Types of Runes
(crafted from 3 grey runes)
(crafted from 3 orange runes)
(crafted from 3 blue runes)
(crafted from 3 green runes)
(crafted from 3 red runes)
Runes can be accessed in the game by going to the main menu and selecting the magic icon. From there you will see a screen that has the altar and all of your runes.
Types II – IV can be crafted from lesser runes by converting them. It takes 3 runes of the previous level to make one of the current level. For example, 3 type II runes can be converted to a type III. 3 type III can be converted into a type 4 and so on.
Runes are required to cast a spell. You can see which ones are needed by again going to the magic screen and then swiping right to access the spell recipes screen.
You can share runes with your friends and cast spells together.