Frosthaven

Frosthaven was a winter Frostivus event that ran from December 19th, 2018 to January 3rd, 2019. It is similar to the Dark Moon event, and was released at the same time as 's, The Magus Cypher.

Gamemode

 * A team of 5 players defend against an onslaught of hordes for 15 rounds. Different enemies spawn each round with the spawns becoming harder every round.

Gameplay

 * 5 players defend the Frostivus Tree at the very north against waves of enemies that spawn from four lanes, which are scattered in all other directions.
 * Almost each round has small units which come in masses and a few big units with special abilities.
 * Two of the rounds are bonus rounds meant to gain an economic advantage, while additional 2 are boss rounds.
 * Experience is gained by killing units (globally shared) and can be gained while dead.
 * Gold is gained by picking up gold bags which enemies can drop upon getting killed. Each round has its gold cap. The bags can be picked up by walking over them.
 * Enemies may also randomly drop instant health or mana restoring potions, which can be picked up by walking over them as well.
 * Between each rounds, players have 30 seconds time to regroup and buy items before the next round starts.
 * The game ends prematurely if the Frostivus Tree is destroyed, or if all five players die before round 15.

Buildings

 * The Frostivus Tree is located at the bottom right of the map. It is part of the objective and must be kept alive.
 * Eight towers defend the Frostivus Tree, four external ones and four internal ones.
 * Towers that survive until the end of a round earn the team extra gold.
 * Three shrines are found on the map, each with a 180 second cooldown.
 * All towers and shrines respawn at the end of each round.
 * Two shops are located on the map. One in the middle, and one near the top, next to the Frostivus Tree.

Reviving

 * On death, a tombstone is left where the player died. Living teammates can right click on the tombstone to revive the player. This takes a channel time of six seconds.
 * The more players that channel on the same tombstone, the quicker it will go.
 * Buyback can be used, but it has a cooldown.
 * All players are revived with full health and mana at the end of each round.

Available heroes

 * Only a few heroes can be picked for this event.
 * Some heroes have altered abilities made specifically for this event.
 * Click on a hero's icon to view its stats, modified/unique abilities and mechanics for this event.

Rounds

 * There is a 30 second intermission in between every round.

Special Items

 * Four special consumable items are available for Frosthaven. Each provides a special ability to help players in-game and has a limited number of charges.
 * Consumables appear on top of the in-game abilities panel, and do not count as visible items.
 * Consumables can be obtained by gaining reward levels, or by purchasing a Frosthaven Consumables Bundle from the Dota Plus store for 1,500 shards.
 * Each consumable has a regular version that players can use in normal (non-event) matchmaking. These versions are purely cosmetic and do not affect game mechanics.
 * Frosthaven versions come with 5 charges, while regular versions come with 20 charges.
 * All Frosthaven consumables have a shared cooldown.

Disabled items
The following items cannot be bought in Frosthaven.

Modified items
These items have been modified.

Item drops
There are 4 different items that can be dropped by enemies, from which 3 are new. Dropped items last for 15 seconds on the ground before they despawn.

The most common drop are gold bags. Picking up a gold bag grants the entire team based on which round it is. A gold bag is automatically picked up when getting within 100 range of it. However, while spell immune, they have to be picked up manually by right-clicking on them.

Enemies also occasinoally drop health potions and mana potions. They have a % drop chance. Health potion instantly restore a portion of the hero's maximum health and mana potion instantly restore a portion of the hero's maximum mana upon getting picked up. Just like gold bags, health and mana potions are automatically picked up when getting within 100 range of them. However, while spell immune, they have to be picked up manually by right-clicking on them.

Enemies may also drop s, with a % drop chance. Unlike the other 3 drops, the scrolls can only be picked up by directly right-clicking them. They also land in the inventory, instead of being instantly activated.

Lore
''Swept up in the zeal of unraveling and reshaping arcane energies, Grand Magus Rubick marches a mob into Frosthaven, intent on uprooting the original Frostivus tree to explore the mysterious font of power beneath it. To stop the misguided magus, five heroes must rise to the defense of the ancient tree—and fight to keep the Spirit of Frostivus alive!''