MythicMobs

Warning: due to a bug on MythicMobs side the condition may not work.

Download: here

RealisticSeasons adds an extra condition to MythicMobs. You can use this condition to specify in which season a mob should be able to spawn and more. Here is the condition:

Conditions: - season{s=WINTER}

"s" can be WINTER, SPRING, FALL, SUMMER, DISABLED, RESTORE