Sporegill (the KF champion,) has the ability Sporedrop. Sporedrop: When this champion is deployed, it spends the first 4 turns as a Mushroom relic with 15 HP, Immobile (This unit cannot move) and Damage Shield - Poison 2 (When this unit is attacked, if the attack is a close-combat attack, the attacking unit takes 4 Poison damage. This damage ignores DEF). When this unit dies, it becomes the same mushroom relic. However, the Mushroom relic that it deploys as doesn't have any abilities indicating that it will turn into a Sporegill. When the champion does spawn, there is no text on the champion indicating that it will turn back into a Mushroom relic on death. TL;DR: The champion itself works fine, but there are hidden abilities.
There aren't any hidden abilities because Sporedrop explains them. I think your issue with it is that the relic form of Sporegill doesn't have anything indicating what will happen? If so, you can always read the thing before you deploy
Really well done explanation of how to reproduce this. It seems like there may be a little more at play than the ability not being displayed, but good find.
Notable: I just realized that the relic DOES say it will turn into a Sporegill after 4 turns, but it's in the description text when you hover over the picture, which is a weird spot for it to be.
