Talk:Re:Monster ~The Goblin Reincarnation Chronicles~/@comment-112.96.173.82-20161130072655/@comment-154.20.146.56-20161130074942

For Aquatic appearance, you'll need the Water Mystic tentacles. For the 2nd one (something Aquatic Monster Battle Ability), you need the Aquatic Monster Tail (the one in Chinese kanji). Both of the items drop from the stages.

If you have the items, select your unit, click on upgrade/enhance, select materials (right button), and scroll down all the way to the bottom. There you'll see a little jumping icon telling you that those are the item you need to feed it.