While it had been an easy task to figure out that the Power of Destruction was enough to inflict serious damage upon Kaeldur, the same couldn't be said about Tyrant.
The Giant Demon's expressions did not betray him and he did a fantastic job of masking the pain he felt, if any, due to Dilan's attacks. Furthermore, he could easily cover the wounds he sustained with the darkness that shrouded his entire body like a second layer of skin.
However, after fighting for two weeks without a single break, it was only obvious that Dilan made a few discoveries.
One of his discoveries was that the Tyrant had a very high resistance to manga-based attacks.
Dilan had attacked the Tyrant with all kinds of attributed wind needles, yet, none of them inflicted any real damage.
This forced Dilan to employ different tactics and switch to using larger mana-based attacks so that he could figure out what element and power caused most damage to the Giant Demon.