Horizon of Darkness

It will take 4 levels and 1/4 of a day to complete this.

-- Aaaah, -- Henry said tiredly in response to this clarification. -- If I had a sledgehammer like in Teardown, I could handle it in a minute. And with a bazooka from Worms -- in a second. Is there really no way to get through here? Rats can get through, and they're so thick? -- he said, examining the rubble more carefully.
-- Hmm, well, let's go north then. We'll avoid large packs of rats this time; we need to conserve our strength.