When You Accidentally Summon a Slime That Is Way Too Powerful (黒の召喚士 X 転生したらスライムだった件)

This transformative work is from Episode 1 of Black Summoner (Kuro no Shoukanshi) and Epiosodes 6 & 9 of That Time I Got Reincarnated as a Slime (Tensei shitara Slime Datta Ken)