Select 1 monster with at least 1 A-Counter on your opponent's side of the field, and take control of that monster. During each of your End Phases, remove 1 A-Counter from that controlled monster. If all A-Counters are removed from that monster, or that monster is destroyed, destroy this card.
|Pack||Abyss Encounter [R]|
“A” Cell Recombination Device is the quickest way to place A-counters on opponent’s monsters, making them eligible to be controlled by Brainwashing Beam. Alien Warrior is able to place 2 A-Counters on the monster that destroyed it in battle, and Alien Overlord is able to place 1 A-Counter on all opponent’s face-up monsters, during each of your Main Phase, so you can have more choices on which monster to take control using Brainwashing Beam.
When you have taken control of your opponent’s monster with A-counters, you can attack your opponent using that monster, then use Mysterious Triangle to destroy that monster and Special Summon another level 4 or lower Alien monster to the Field for another attack.
|Monster/Spell/Trap categories||Destroys itself|