Board Thread:Question and Answer/@comment-67.189.74.13-20150422114328/@comment-25151790-20150422171831

Yes, it is.

Go to Upgrade and choose the card you want to upgrade. Select one N card to feed and press the "Arcana" button to select the Arcana you wish to use. You can use up to one type of Arcana ATK and one type of Arcana DEF. Press "Upgrade" and you will have applied the Arcana. Repeat this as many times as you want until you reach your desired attack and/or defense.