Undead Summoner: Skills upgrade once per second

[Cool story + no heroine + invincible + dungeon flow] Change to become a summoner of the dead, and the skills can be upgraded once per second, and there is no upper limit for permanent upgrades. [Small Skeleton Summoning] – [Big Skeleton Summoning] – [Elite Skeleton Summoning] – [Epic Skeleton Summoning] [Desperate Skeleton Summoning] [Scary Skeleton Summoning] … After N upgrades [Skeleton Summoning to Welcome the Return of the Great Skeleton King] In addition, there are [Hellfire Summoning] [Hellhound Summoning] [Bone Dragon Summoning] [Ghost Summoning]… Skills are upgraded once per second, how do you deal with it?