Target the Baby Demon Lord in Alchemical Laboratory

Alchemical Laboratory Survival or Pure Strategy in original Dungeon Defenders, unlocked by its Campaign clear.

Before you go

Complete Alchemical Laboratory Campaign to unlock Survival and Pure Strategy.
Check the map reward listing for the Baby Demon Lord milestone.
Start at least two waves before the qualifying pet wave, which must be wave 15 or later.

Select Alchemical Laboratory and choose Survival or Pure Strategy.
Review the map’s reward information and identify the Baby Demon Lord milestone.
Set a difficulty your defenses can hold through the target wave.
Place defenses to cover the lanes and protect crystals during the build phase.
Start waves and watch for weak coverage; repair between rounds before advancing.
Complete the qualifying pet wave and open its reward chest.
Inspect the Baby Demon Lord’s stats and keep it or repeat the map for another roll.

Pure Strategy disables hero attacks during combat, so prioritize defense coverage over hero damage.
Confirm the milestone in the selected mode before you commit to a long run.

Repeatable for additional pet rolls, but each attempt requires reaching the map’s qualifying reward wave; pet stats vary.

Using another map’s reward threshold: verify Alchemical Laboratory’s listing.
Starting too close to the milestone: begin at least two waves beforehand.
Treating a pet as guaranteed from any Survival wave: complete the specific reward milestone.

Stop once you have a usable pet or when your defense cannot reach the milestone reliably; improve the setup before another attempt.

Sources & fact checks

Open a guide to find other locations and see what the item is used for.

Survival and pets

Offers a separate named pet target and milestone route on Alchemical Laboratory.