Anyone know this units looting spot?

[uniya81]

The unit is airplane and stats is 27att / 24def.
I saw someone has over 100 planes. His level was 75 or so.

Anyone know where i can farming this units?
(Sorry for.. i didn't make a screen shot)

[What?]

Sounds like it might be viper fighter jet. It is a cash unit for 1.2 million.

[uniya81]

wow, Thank you so much for your advice :)
I didn't know that was cash units.