Ethnic origin
Vaevictis Asmadi, the Dire is an Elder Dragon that can be used as a great removal option with a drawback of having the chance to summon something big for our opponents , but at the same time it can be used as ramp by sacrificing a small creature or token to get a powerful (but random) Dragon from our deck in its place
Except for doing that, your reward is a big vanilla creature
Offering a scalable threat, menace, and even removal, Stalactite Stalker does it all, so long as you keep Descending
Duggan wont solve the lack of interaction in Deep Sea Clues, but he does give you a bit of removal along with a creature that fits your plan
Whats even more amazing is how efficient every part of the card ends up being, to the point that the biggest weakness on Shigeki is a lack of haste