Aurora Battle Princess, Execute Lemonun

[AUTO](RC):When this unit attacks, [COST][Counter-Blast 1] &[Soul-Blast 3], choose up to three of your opponent's rear-guards, and imprison them in your Prison. Then, if three or more of your opponent's cards are imprisoned in your Prison, until end of that battle, this unit gets [Power] +10000, and if five or more are imprisoned, it gets [Critical] +1.