Visual bug, steps to reproduce:
- Have a token from Reef Worm dying (e.g. a Whale)
- Have Mockingbird enter as a copy of the Whale token (as a Whale Bird)
- Cast Croaking Counterpart on the Whale Bird, making a Frog token called Whale with flying (not shown in images, already dead).
- When that Frog Whale dies, the Kraken token it makes will have the art error.
- Additional copies of Mockingbird entering as that Kraken token will display Mockingbird's art.

I think it's the combo of both Mockingbird and Croaking Counterpart that cause the issue, either one by themselves can copy Reef Worm's tokens and generate the next token correctly when they die.