0 I’ve Been Killing Slimes for 300 Years and Maxed Out My Level Apr. 10, 2021 I’ve Been Killing Slimes for 300 Years and Maxed Out My Level 2021 885 views I’ve Been Killing Slimes for 300 Years and Maxed Out My Level anime episodes in english. Other names: Slime 300, Slime Taoshite 300-nen, ... Based on a Light NovelComedyDemonsEnglish subbed AnimeFantasyIsekaiMagicReincarnationSlice of Life