Bosses have a 33% chance to spawn at the end of each game. Bosses are optional, meaning the game has ended in a victory and players are rewarded the end-game XP at the beginning of the boss wave.

Each boss performs a combo when it reaches 100 adrenaline, much like how players can activate combos. Below is a list of some combo effects that can be put on players or minions of the boss:

Boss Combo Effects
Defense Up/Down: Increases or decreases the affected target's damage reduction.
Attack Up/Down: Increases or decreases the affected target's damage bonus.
Shared Damage: Damage dealt to the affected target is divided by the number of allies of the affected target. The damage is distrubted to all allies of the affected target.
Taunt: Prevents allies of the affected target from receiving damage, and the affected target receives the damage instead. % indicates how much of the damage will be absorbed by the affected target.
Heal Stop: Prevents allies from healing the affected target. The affected target can continue to self heal. Does not affect vampire or blood magic.
Inaccuracy: Provides a % chance to drop the damage dealt by the affected target to 1.

Adrenaline Drip rates
Slow: 3 adrenaline/second
Normal: 5 adrenaline/second
Fast: 7 adrenaline/second
All bosses will activate their combos at 100 adrenaline. There is a 25 second cooldown period after activating a combo before bosses start to regenerate adrenaline again.

Boss of the Month: Arctic Nali
Boss of the month has an additional 10% chance to spawn during the current month

Current roster of bosses:

Lucifer
- Element: Fire
- Adrenaline drip rate: Slow
- Very Rare Material: Uranium Pellet
- Lucifer has an innate ability to retaliate 50% of the damage back to players who use a Heat or Solar Power weapon
- Combo:
1) Deals 200 damage to all players
2) All players receive Burn damage for 20 seconds

Glass
- Element: Ice
- Adrenaline drip rate: Normal
- Very Rare Material: Star Chart
- Combo:
1) Deals 150 damage to top 3 players
2) Steals 20% of adrenaline from top 3 players

Tentator - only appears during October
- Element: Ice
- Adrenaline drip rate: Fast
- Very Rare Material: None yet (+5% chance)
- Combo:
1) Casts Life Drain on the top level player for 20 seconds
* Life Drain steals 10% of health from the target's health per second
2) The top level player receives Misfortune for 20 seconds

Arctic Nali - only appears during January
- Element: Ice
- Adrenaline drip rate: Fast
- Very Rare Material: Moonlit Stone (+5% chance)
- Arctic Nali has an innate ability to retaliate 50% of the damage back to players who use a Freezing or Arctic magic weapon
- Combo:
1) Deals 100 damage to all players
2) All players receive Freeze for 10 seconds

Original post updated to show what the bosses do and their combo effects. I'll continue to update that post as we make more bosses. All bosses now spawn up to five minions.

New boss - Lucifer, first post updated.

New boss - Glass, first post updated.

A note about Glass is that she steals 20% from each top 3 players' adrenaline. This will easily allow her to do the next combo much faster, so a strategy here is to keep your adrenaline low when she does her combo.

New boss - Tentator, first post updated.

Tentator will only appear during October as a Halloween boss special.

Tentator doesn't deal any direct combo damage, but life drain will quickly lower the player's health. You can either keep yourself healed but by doing so you also provide Tentator with more health to steal, or you can keep your health low and act more as a support role to other players.

New boss - Arctic Nali, first post updated.

Arctic Nali will only appear during January as a winter boss special.

Arctic Nali drops the Moonlit Stone material.