Volrath, the Shapestealer | Akki Battle Squad

Cards

Akki Battle Squad has at least one counter on it.
You control a modified creature that can tap to produce at least ({1} magic symbol) .
You control a modified creature that can attack this turn.
An opponent cannot block and kill creatures you control.

During your combat phase, activate a modified creature you control by tapping it, adding at least ({1} magic symbol) .
Activate
Volrath by paying ({1} magic symbol) , causing it to become a copy of
Akki Battle Squad until your next turn.
Declare any modified creature you control as an attacker.
Volrath triggers, untapping all modified creatures you control and causing you to get an additional combat phase after this one.
Repeat each combat phase.