Online Mission Cycle?

so i was wondering if theres a cycle for repeating the Online Missions. Because ive finally been able to make a team that allows me to complete the online mission pretty fast. Seeing as i had to completely restart everything. and the only mission ive got atm is 2 destructors. and i know shadow stalker has already came back recently and i absolutly love her. so is there a cycle or does it just happen? 

It seems that there’s a cycle until the updates.  For example, they’ve been cycling through other monsters such as octoneer and shadow stalker; however, other monsters before the update have yet to be seen again in the OM.  So I think there’s a cycle until the monsters are put into the normal golden egg category.

Yes there’s a cycle in the online missions…
This is good because we can get some OM arkadions that i didn’t collect in past missions (i started winning OMs at the start of the past season, with Gearwolf mission),
but this is also ”bad” because we don’t see the older OM arks (like Mossgolem, Minespider ecc…) in those missions.

Yeah.  I never managed to level up my arkadions enough to get minespider.  I did get the “Ancient Weapon” for this week though which I’ve wanted for a while now.