Sabina would've staggered back if she had been up on her feet. There was a handful of reactionary thoughts warning her to disagree with such terms.
Regardless, there were also some unignorable factors baiting the hook of Rizz's offer.
She had already passed Rizz's trial and just had to keep supporting the goblin until they could form a proper seal, which was supposed to help Sabina grow even more.
Rizz had thus far proven his skills, in many ways. From how he kept the big bison at bay despite the level difference to his unique abilities to see through people and creatures, or possibly even items like her storage necklace.