[System Hint: You can use the Super Skill Level Booster Card to increase the skill level of the Tracking Mark]

[Super Skill Level Up Card is a card that is specially used to upgrade SS-level skills to SSS-level skills]

[System prompt: After the skill level is upgraded to SS level, if you want to upgrade the level again, the ordinary skill level improvement card is invalid]

[Only Super Skill Level Up Cards can upgrade SS-level skills to SSS-level skills]

"Raise the skill level of the Tracking Mark?"

"Can only be leveled up with super skill cards?"

"Ordinary skill level up cards can't upgrade SS-level skills?"

Chen Kai saw the ...... given by the system

"Save the World from a Slime" Chapter 303: SSS-level skills are being hit by hand, please wait a while,

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