I don’t think the card looked different if I remember correctly, the problem was that Athena stacked with every other defense down and the damage formula was working different, allowing extreme damage.
https://forum.smallgiantgames.com/t/1-9-release-notes/9302
https://forum.smallgiantgames.com/t/athena-solution/2610
Edit: na she was making much more defense down also
https://forum.smallgiantgames.com/t/balance-change-on-athenas-special-skill/1488