Updated: Text
[CONT](RC):All rear-guards cannot attack the vanguard during the fifth battle of that turn or more unless [Counter-Blast 1] is paid.
[ACT](RC):COST[Remove this unit], and until the end of your opponent's next turn, you get "when it is the fifth battle of this turn or more and your opponent's rear-guard would attack a vanguard, it cannot attack unless [Counter-Blast 1] is paid.".