I think that a new dark troops should be created.
The Kraken is an octopus like creature that flies above walls and picks up troops and lifts them over walls. It will have relatively high hitpoints. E.g. 1000.
The special ability of the kraken is that the kraken will pick up any ground troop and drop it at its preferred target. e.g. the kraken would pick up a giant and drop in on a defensive building or a goblin on a resource.
