Frost Moon

"Moon blessed with a christmas spirit..."

The Frost Moon event was introduced in 1.3.1.1.

This event can be activated using Ice Globe during night time.

Waves
New waves can be reached by killing mobs.

The formula for killing mobs for the new wave is: 5+(5 * waves amount).

After reaching 5th wave players in this event will get Ice Scream achievement.

6th wave is last wave of this event and it counts as "Ultimate" wave