Killroy's Slaughterhouse
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Killroy's Slaughterhouse is a weekly challenge accessed from Killroy in the YumYum Grotto where you are given two randomized selections of rooms (the second selection room unlocks after reaching World 4). The random factors are which class can enter and what the enemy will be fighting, the map is the same as the mob's spawning area. Killing enemies within these challenges will award the player with Talent Point Tab's and 
Skulls which act as a currency for the Skull Shop, also provided by Killroy. When the challenge resets your Skulls will also be reset.
Rooms can be reset using Airhorn for 400 
.
Skull Shop
The Skull Shop offers the following selections:
| Reward | Price
|
|---|---|
Random Time Candy x1:
|
5 |
 Black Pearl x1 |
9 |
 Holy Pearl x1 |
10 |
| Next Kill Spawns a Crystal Mob | 3 |
 Dungeon Loot Dice x1 |
6 |
 Arcade Balls x6 |
4 |
 Library Checkouts x2 |
8 |
 Refinery Cycle x1 |
1 |
 Pet Eggs x2 |
8 |
 Cooking Ladles x3 |
5 |
After unlocking Killroy Prime from The Rift you will have access to these 4 additional upgrades:
| Reward | Price
|
|---|---|
| 1% Chance to permanently unlock the 3rd Killroy Weekly Fight! | 4 |
| Permanently boosts Artifact Find Chance! | 9 |
| Adds 1 nugget to your Shovel in Gaming, go dig it up! | 5 |
| Permanently boosts Crop Evolution Chance! | 6 |
| Permanently boosts Jade Gain! | 7 |
Room Upgrades
After time's up in any battle you'll be granted to choose one of the six "Upgrades" which are permanent for all future runs that boosts your progress/rewards within room:
| Upgrade | Description |
|---|---|
| +1 Second Timer | Increases your maximum time in room. Base time is 100 seconds. |
| + Talent Drops | Increases chance for Talent Point drop, depends on how many Talent Point drops already got |
| +1% Bonus Skulls | Increases chance of dropping skulls by mobs |
| Faster Respawn | |
| Dungeon Drops | Mobs can drop Dungeon Credits now |
| Pearl Drops | Mobs can drop Pearls now |
