Call of colossus spell question

[mnorbi75]

Hello!

My question is : i have 2 call of colosuss spell, when i try use it is give me level 5 th mobs, i try it use at different islands. I get different mobs evry islands. I waited 2-3 level up and i use it again same islands, and i get total diferent level 5 th mobs as befire. So my questions how works it? Cause if i try in 1 hour at same island it give same mobs, i have to wait 2-3 level up for nee random mobs. I need red dragon, so it would be nice if someone can write me how works it. Sorry my bad english , i hope you understand What i want.

Thx