Tag is to be used ONLY if the protagonist of the series has the ability to steal the 'skills' (definition may vary based on novel) of other characters/things. If the series has multiple protagonists, only use this tag if the stealing ability is a prominent ability of one of them.
The empire has turned into the land of the undead due to a spell gone wrong. God summoned heroes from countless worlds to purify the empire and plant new hope. Lee Shin Woo, an ordinary earthling, was also summoned. As an undead, that is.