Recently Dota 2 received an update with following changes
- Frosthaven has now ended.
- The Frostivus consumables bundle no longer contains Frosthaven consumables. Its price has been lowered to 750 to reflect this.
- Added a missing skirt to the Mistress of the Long Night set. Players who have already unbundled the set and own a Belt of the Long Night will be granted a corresponding Skirt of the Long Night.
Source:- Dota 2