The Planet Cannon, a perfectly standard Tier 4 Ascension Architecture, uses the continental frame as its gun base, the Star Core as its power source, the Mantle as its gun hoop, and planetary thermal energy as its "shell." Usually it takes a hundred years of accumulated planetary heat to fire just one shot—and when that one shot is unleashed, it's enough to destroy heaven and earth, even blow apart vacuum in the Cosmos.
On a large-scale interstellar battlefield, Advanced Civilizations will refit one planet after another into Planet Cannons, powered by Fixed Stars, working in tandem with Interstellar Fortresses. Whether the invasion comes from the material world or from dimensional rifts, they can annihilate the enemy through large-scale Annihilation effects—this is the famous Anglemar Defense Line, a classic Star Wars tactic recorded by the Civilization Council.
