The Goblin cannons inside the ruins were divided into three models in all. The smallest caliber was not much bigger than Landen's clenched fist, while the largest was a full size larger than the Magic Pattern Tiger's big head.
The bodies and magic patterns of the three models were almost exactly the same: a long tube, with the magic patterns on the outside responsible for absorbing magical elements, and the internal magic patterns responsible for accelerating the ammunition inside the barrel.
Landen took some magic crystals from the secret chamber where the cannons were stored to serve as the Goblin cannons' source of magic, then tested them one by one. The test conditions were very simple: set up a half-body suit of iron armor with no magic patterns fifty meters away, test three cannons of each caliber, and measure their power.
The testing process was not complicated, but the results were quite interesting. Under the same condition of firing an iron crossbow bolt, the smallest-caliber cannon could barely pierce iron armor without magic patterns; the largest-caliber cannon had a better penetration effect, but required five times as many crystals as the smallest caliber.
After switching to grapeshot, none of the calibers could pierce the iron armor, while the large-caliber cannon could fire far more ammunition than the small- and medium-caliber cannons. Of course, the large caliber also required more crystals.
Even though he had been mentally prepared, the cannon's power being this weak still made Landen's glasses fall through the floor. With everyone in the Gallop Knight Order currently equipped with magic-patterned heavy armor, these things had no room for use at all.
"Landen, I told you, didn't I? This thing's power is too weak and the cost is too high. If you're going to use magic crystals like this,