Ahoy, adventurers! It’s Salty here with some knowledge. (Or, you know, information, either way.)
As discussed the other day on stream, Heroic Gems are our latest feature to keep the game fresh and moving forward. Lycanthropy is part of that initiative - introducing new challenges and considerations for you to experience. Unfortunately, Lycanthropy had a few issues on release, and for that we apologize; we’re updating our test plans here to better catch future issues like this in new features.
Now, onto the effect itself. Lycanthropy is a “transform” and, as such, it will act like other transforms in the game (e.g. Possessed King and Night Hag) with regards to stats and traits. Lycanthropy is a little bit unique in that it’s NOT an entirely negative status effect in every case, and that’s by design - we believe it’s great to be presented with tools that require a little consideration in their use - for example, cast on a powerful troop it can be debilitating to an enemy team if it triggers, but cast on a weak troop it can backfire and slow you down on your path to victory.
In the case of Essence of Evil - which is something we know you’ve brought up - it’s actually helped provide some balance to the item without us having to adjust mana costs or other spell effects, which was why it wasn’t added to the “naughty list” in the last balance update.
I hope this has answered some of the questions you’ve been asking about what we intended with Lycanthropy.