Forum:How can I evolve level 4 units?

Examples:

Garroter Shida - Lich, Ice Ruler Sergio, Fire Knight Agni

I can't evolve any of these, though they do have a 5 star evolution when I am looking at this wiki.

Shidas evolution: http://bravefrontierglobal.wikia.com/wiki/Executioner_Shida

Lichs evolution: http://bravefrontierglobal.wikia.com/wiki/Legion

Ice Ruler Sergios Evolution: http://bravefrontierglobal.wikia.com/wiki/Ice_Knight_Sergio

Fire Knight Agnis evolution: http://bravefrontierglobal.wikia.com/wiki/Magma_Knight_Agni

Fire Beast Zegars evolution: http://bravefrontierglobal.wikia.com/wiki/Beast_King_Zegar

What do I have to do to evolve them?