Monster Keep — Merge Defense
Summon monsters, merge them into stronger defenders, and protect your dungeon crystal from invading heroes.
Summon monsters, merge them into stronger defenders, and protect your dungeon crystal from invading heroes.
Use the controls shown inside the game. Fullscreen, sound, and restart are available above the player.
The heroes are invading—and this time, you defend the dungeon! Build a team of monsters, merge matching units to increase their power, and choose their positions to stop each wave. Protect your crystal through 50 stages across five worlds, each with different enemy routes and summon locations. Discover 10 monster types, upgrade your defenders, unlock research, and face 10 enemy types with different weapons and abilities. Drag or tap to merge. Summon wisely. Keep your crystal standing!
Beat your best score and climb the leaderboard!
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