The first demon Evan summoned was the 72nd demon, Count Andromalius. He was the weakest of all the 72 demons, but the price for his power was also the smallest. Of course, each demon had different levels of sigils, and the cost could vary.
By far, the strongest demon Evan summoned was the 70th demon, Prince Seere. Even considering Evan's current strength, this demon's spear was worth three years.
As Evan prepared for the battle in the forest, he drew two sigils on the palms of his hands. One belonged to - 70 demon Prince Seere, and the other belonged to 69th demon Marquis Decarabia.
Evan didn't want to use this sigil because the cost was quite high, but he had no other option. The monster was using his special ability, and Evan needed something equally destructive in return.
When Evan activated the sigil, his mind was transported to Nirvana. A demon was already waiting for him, strikingly different from all the previous demons.