Dreadshoal Hermit

When Dreadshoal Hermit enters the battlefield,
surveil 2. (Look at the top two cards of your library,
then put any number of them into your graveyard and
the rest on the top of your library in any order.)
Then, you may exile target artifact from your
graveyard. Dreadshoal Hermit has +0/+X,
where X is the combined mana value of artifacts
exiled this way.
No normal shell could fit its fragile bulk.