Overlord - Follow the path straight back to Oberon. Back at Oberon to his right another root is gone and you can get a tower object. It is the Shield spell. Have your minions grab it. You may want to clear the way first as monsters will have respawn.

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Follow the path straight back to Oberon. Back at Oberon to his right another root is gone and you can get a tower object. It is the Shield spell. Have your minions grab it. You may want to clear the way first as monsters will have respawn.