Although the Seeking Fortune and Avoiding Evil Skill could have been used for testing, it is heavily disrupted inside the Crimson Iron Ant Nest Talano; hence, Zhang Yanhang released a Death Wave that was unaffected and could cover all enemies within its range, even through walls, to test an actual Skill Coverage Range Bonus.
After releasing the Death Wave, Zhang Yanhang quickly realized that the Skill Coverage Range Bonus likely increased the diameter of the coverage area, as his Death Wave, initially covering a diameter of 1200 meters, now reached nearly 1400 meters.
An increase to the coverage area alone would definitely not achieve this extent; after all, according to the formula for the area of a circle, a 15% increase in coverage area would require a diameter of less than 1300 meters to achieve.
