Team Leader, Baalnur

Because Spike Brothers seem to be lacking in the Grade 3's. Well, the Vanguard part, not the Rearguard.

Team Leader, Baalnur | Grade 3
Spike Brothers/Warbeast
Power: 11000 | Shield: N/A
Continuous (V): If you do not have a <Spike Brothers> rear-guard, this units power is -4000.

Auto (V):[Counterblast [5]] When this unit attacks, you may pay the cost. If you do, this unit gets Power +10000/Critical +1 until the end of that battle, and at the beginning of the close step of that battle, retire one of your Grade 2 or lower rear-guards.

Auto (R): When your Drive Check reveals a Grade 1, call that unit to an empty Rearguard Circle.

Not sure if it should be retire one or two Grade 2 or lower rears. Any ideas on what I could do to improve the balance?

I don't think the problem is the balance, so much as it is just plain not fitting with the Spike Brothers them of rapidly Superior Calling for more attacks.

Edited a bit to suit more of the Spike Brothers feel.
But it's not for attack spamming.

Make it Mega Blast. Normal CB5 Seems a bit cheap, tbqh, for an effect of that magnitude. Also, make some kind of search effect. Maybe an SC? But not too broken. Look for a G0.