Corn's use of wording is worrying. "Would you take care of ANYTHING water related for my corn fields" and then following up with "Done" sounds like he's binding Amaroq into a contract of, well, doing all of Corn's work for him for comparatively little in return. The ominous music cue seems to indicate that his intentions are manipulative, even malicious.
It seems that, due to to the Mercy Bow, the manipulative human Corn gained a snake form, while the crying axolotl Corn gained a human form. The Mercy Bow may, presumably, be a source of healing(???), so is it possibly trying to heal the turmoil of Corn's dual nature?
Looking forward to wherever this is going.