Awaken cards do the same thing
The new Wreck-It Ralph characters Vanellope and Snowanna, for instance, have the rush ability to challenge opposing characters as soon as they are played, but dont have a huge benefit like the current Amethyst/Ruby decks do when potentially trading characters in this way, such as drawing when banished
There are also other rare variants with alternative art and styles never seen before
If you have six more Energy Cards attached than the cost of the attack, you can flip ten coins and deal 100 damage each time you land on heads
Comparing recent MTG Store Championship events to Lorcana ones is a depressing example of this
However, it can be useful in a scenario where you haven't drawn waste not, so you can let it gather a few counters