For further protection, store those titanium blocks in a “portable Hole” so they exist only in the Astral plane: https://www.dndbeyond.com/magic-items/4699-por

For further protection, store those titanium blocks in a “portable Hole” so they exist only in the Astral plane: https://www.dndbeyond.com/magic-items/4699-portable-hole https://www.dndbeyond.com/magic-items/4699-portable-hole