Everyone: Necromancer, Others Spend Mana but I Waste Life

The game comes to another world, death comes quietly, and everyone enters the era of magic job change. Terrifying alien creatures, strange abyss secret realms, and countless challenging dungeons. Death and opportunity coexist, fight monsters to upgrade, challenge the abyss, and wander between death and climbing to the top. … On the day of his job change, Yang Feng awakened as the only professional undead summoner in the dark system. "The Lich King of the Abyss!" "Ten Thousand Years Skeleton King!" "Thousand-year Bone Dragon!" "…" Summon the undead to crush them together! But his summons seemed a little different. [Ding~ Summoning a level 1 skeleton elf requires 1 year of health. Are you sure? [Ding~ Summoning a level 10 lich requires 10 years of health. Are you sure? … [Ding~ Summoning a level 100 bone dragon requires 99 years of health. Are you sure? Yang Feng's brain was full of documents. What the hell is this? Others summon Fei Lan, but my summons is so life-consuming?