【Volumes 1-2 of the novel are now available from MF Books】

【A manga adaptation by Izumi Usu is currently serialized on ComicWalker】

【Manga Volumes 1-6 are now available from MFC】

Prince Heal of the Kingdom of Sanphales was born with the ill-fated crest of the [Cave King].

Due to this crest, he was eventually relegated by his father, the King, to lord of a remote island.

Naturally, it was an isolated island with no inhabitants, no vegetation, and only a single small cave.

However, the moment Heal gripped a pickaxe inside the cave, his [Cave King] crest activated.

Its effect specialized in mining, allowing him to efficiently extract various ores.

Among the ores obtainable on the island were stones that increased magic power, and even stones that could extend one's lifespan...

Heal became completely engrossed in mining, and before he knew it, he had built the strongest nation.

（Old Title: I Was Banished, So I Dug Relentlessly In Caves, And Before I Knew It, I Was The Strongest Sage And Had Built The Strongest Nation）