Telepad

Unlock
The Telepad can be unlocked after solving all of the Tier 19 Feats. It costs 30 Moon Runes and 30  Blood Runes and has 3 uses.

''Summons Cadets. Beat them to earn a Cosmic Chest.''

Mechanic
The Telepad can be activated three times. Each time it will summon a Cadet, which acts like a Mini-Champion invading the Dungeon. After defeating the Cadets, the Telepad gets damaged and drops a Cosmic Chest.

Note that only 1 cadet can be in the lair at a time, their health is random, and they cannot be fed to the Devourer (as they teleport out of his stomach every time they are fed to it), so it is important to have various fighting strength minions to be prepared.