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Additional Rare Monsters
Additional Rare Monsters can spawn in Rare Monster Packs with larger pack sizes.

Each Rare Monster in the Pack provides one modifier to the Pack's Minions.

Additional Rare Monsters in Essence Packs also carry Essences.
Essence Monster Packs have a 50% increased chance to have an Additional Rare Monster
Applies to Level 75+ Areas
Requires completing the Burning Monolith
Rare Monster Packs in City Areas have a 75% increased chance to have an Additional Rare Monster
Applies to Level 70+ Areas
Requires completing the Eastern or Western Gateway
Rare Monster Packs in Desert Areas have a 100% increased chance to have an Additional Rare Monster
Rare Monster Packs in Desert Areas with Additional Rare Monsters instead have a single Rare Monster with doubled Effectiveness
Applies to Level 70+ Areas
Requires completing the Eastern or Western Gateway
Rare Monster Packs in your Maps have a 20% increased chance to have an Additional Rare Monster
Pack
A Pack Monster or Minion is a Monster that naturally spawns as a part of a Monster Pack in areas or from mechanics like Strongboxes.

Modifiers to Pack Size also provide a chance that there is an Additional Rare Monster in the Pack.

Monsters summoned or created by other Monsters do not count as Pack Monsters or Minions.
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