My Slime Dragonslayer - Episode 4

Leon attempts to use his Divine Slime's Myriad Transformations skill to transform it into an S-Rank Goldflame Dragon, but the transformation fails because he lacks the necessary Soul Stone. The system explains that Soul Stones, required as transformation mediums, must be obtained by defeating monsters, exploring, or purchasing them, and higher-rank stones yield stronger transformations. Frustrated, Leon realizes he can't directly transform the Slime into powerful beasts without these rare stones. Meanwhile, Riverside Academy rejects him harshly, demanding compensation before allowing him to stay, leaving Leon isolated and pressured to find a way to prove himself.