New Troop Idea - The Crow (Dark Elixer & Air)

Hi, crashers!
Here is my idea.

Name of Troop : Crow
Training Cost (in Elixir or DE) : 15 DE
Training Time : 1min
Housing Space : 1
Favorite Target : Resources (Damage x3)
Damage per second : 20
Hit Points : 150
Movement Speed : 32
Description : Crows love coins like Goblins. They always steal something. So, they are very useful.
Reference Art
Attachment 81391

(I drew this)

Level 2.
Damage per second : 23
Hit point : 125
Training Cost : 20
Upgrade Cost : 15000 DE

Level 3.
Damage per second : 26
Hit point : 150
Training Cost : 25
Upgrade Cost : 30000 DE

Level 4.
Damage per second : 30
Hit point : 180
Training Cost : 32
Upgrade Cost : 50000 DE

p.s : I don't live in English-Speaking world. So, I cannot speak English well. Sry and Thx.

:)