Summon: the Undead Army Charges!

One day, countless time and space rifts appeared in the Blue Star world, and people called this day a disaster day. Foreign humans, machines, orcs, elves, plants... Invading Blue Star, Humans had no choice but to band together and build cities to protect themselves. Summon [Elite skeleton warrior, peak spiritual energy creature, energy value 10 points, occupancy limit 1] [Skeleton warrior, spiritual level entry-level creature, energy value 20, occupancy limit 2] The characteristics of the Undead Summoner, the summoning limit occupied by the same level of troops is reduced by 5 times. With the multiplier sigil, I can summon double the summons. The army of the undead listens to my command and charges! When the final boss appeared, he found that his attacks on the undead were ineffective.