New Dark Troop: The Luna

This is a troop that may be a good idea, the Luna (I'm not so great with names, sorry!)
Troop name: Luna
Training cost: 1000 Dark Elixer (There's a reason for this)
Training time: 30 minutes
Housing space: 5
Favorite target: Defenses (damage x2)
Damage per second: 200, as well as heals 10 hit points per second to troops within a 2-tile radius.
Hit points: 1000 (takes 2x as much damage from archer towers)
Movement speed: 25
Description: This small black cat works to aid fellow troops, and deals great damage. However, she is vulnerable to Archer Towers, but mortars cannot see her.
Reference art: attached
She starts very small at level 1 but grows larger or more fierce looking as she levels up.