As for the Red Flame Crystal's rarity, it's just one aspect of the reason.
More importantly, the Red Flame Crystal has a massive allure to the Earth Spirit Rat and can also play a significant role in its subsequent cultivation.
Therefore, if it were some other treasure, the Earth Spirit Rat might not care as much, and splitting a portion of the benefits with Lin Tianming as compensation wouldn't be a problem.
But now, the treasure they cooperated to collect is the Red Flame Crystal.
For such a treasure, even the Earth Spirit Rat finds it insufficient for itself, and if Lin Tianming were to take away forty percent of the amount, it would further squeeze the Earth Spirit Rat's prospects.
This is something the Earth Spirit Rat absolutely does not want to see.
In the heart of the Earth Spirit Rat, it hopes to use other treasures as compensation for Lin Tianming and his spouse.
Only in this way can it ensure it gets what it most desires, and the quantity reaches the maximum level.
