Idle Slayer: Addictive Clicker Bestiary Upgrade Guide

Unlock the Bestiary upgrade from the Ascension skill tree to track your monster kill counts and view tier thresholds across every unlocked realm in Idle Slayer: Addictive Clicker. Instead of staying indefinitely in a single farming zone, use the Bestiary interface before activating a Portal to target under-farmed dimensions, secure specific crafting materials, and advance monster milestones systematically.

How the Bestiary Upgrade Works

Once purchased from the Ascension tree, the Bestiary catalogs every defeated enemy type across all accessible dimensions. The log tracks total kills and displays the exact kill counts required to hit subsequent tier thresholds.

Checking the Bestiary serves as a practical audit tool after an Ultra Ascension or before traveling to another realm. It reveals which baseline enemies lack sufficient kills, allowing you to choose your next Portal destination based on incomplete milestones rather than default habits.

Dimension Milestones and Farming Priorities

Each realm offers different enemy densities, base soul rewards, and crafting drops. Balance your route between swarming low-health targets to clear kill quotas quickly and farming tankier monsters for high Slayer Point gains.

Dimension	Primary Bestiary Targets	Farming Profile
Haunted Castle	Slimes, Ghosts, Skeletons	High early enemy volume for fast milestone clears
Desert	Cobras, Scorpions, Anubis	High base soul yields and endgame Slayer Point scaling
Mystic Valley	Bats, Treants, Spiders	Essential Bag materials and balanced kill progression
Factory	Drones, Toxic Barrels	High spawn density for rapid objective clearing

To progress through Bestiary tiers efficiently, follow this rotation sequence:

Audit Low-Tier Entries: Open the Bestiary to identify zones where early-tier monsters remain below their current kill threshold.
Select Your Portal Destination: Target realms with the highest concentration of lagging thresholds before using your Portal cooldown.
Clear Swarm Zones First: Farm high-density areas like the Factory or Haunted Castle to complete low-tier quotas with minimal downtime.
Shift to High-Yield Realms: After finishing basic swarm tiers, portal to the Desert or Mystic Valley to advance heavy monster quotas during soul multiplier windows.

Optimizing Kills with Rage Mode

Farming Bestiary tiers should support your overall soul income rather than slow it down. Use standard bow fire and dash attacks for normal enemy waves, and reserve high-impact cooldowns for large groups.

Trigger Rage Mode on Mega Hordes: When a random box triggers a Mega Horde or Frenzy event, activate Rage Mode immediately. The increased attack rate wipes out stacked enemy packs in seconds, registering dozens of Bestiary kills while maximizing Slayer Point returns.
Avoid Solitary Activations: Do not trigger Rage Mode to finish off isolated enemies simply to complete an entry threshold. Expending full charges without an active swarm or multiplier wastes potential soul gains.

Balancing Kill Goals with Crafting Drops

Monsters tracked in the Bestiary also supply key Bag materials required for permanent village buildings and temporary craft recipes.

Before using a Portal to leave an area after completing a Bestiary milestone, check your inventory reserves:

Mystic Valley: Defeating Bats supplies Bat Wings, which are required for temporary soul bonus potions.
Haunted Castle and Plant Zones: Ensure you have adequate reserves of Slime and Roots before rotating away.

If your crafting inventory falls below the threshold needed for upcoming recipes, remain in the zone until your material buffer is restored. Once your crafting supplies and Bestiary goals are both satisfied, activate your Portal to start farming the next target dimension.