The Esper organization researched the super-powered cannons based on the method of "mixed power reaction".
The mixed power reaction was the reaction caused by different power. It would achieve a qualitative leap after they gathered together and then transformed into energy beams to strike targets.
For example, in chemistry, when different chemical reagents were mixed, they would cause some particular chemical reactions.
The Esper organization researched the super-powered cannons in this principle.
However, the actual use method was very complicated.
Paul asked the team to prepare the super-powered cannons. It took twenty minutes to get it ready.
Every esper team in North America was grouped in a particular rule to ensure that the team members could be united together and their power could be mixed to create super-powered cannons.
This energy beam was bright and hot.