How to defeat an older version of you? (second time around)

[Metroplex]

There is this test near Adrian Peaks I think where you have to battle first yourself (a clone) with the exact same army you have, I did this, but its the second test where an older you (the clone) has once again the same army as you but DOUBLE, I can't defeat him yet, anyone tell me how they have done this test and passed? He seems to use the phantom spell a lot, which I don't have, where do I find it? I'm a mage.