Combine this card's effect with those of ""A" Cell Breeding Device" and "Vengeful Bog Spirit". Your opponent will be unable to attack when their monsters first appear, giving you time to place an A-counter on them, which then paralyzes their monsters. Use an "Alien Mars" at the same time to truly cripple their monsters.
Note that this card's effect also extends to monsters with A-counters that you control. If you plan on turning your opponent's monsters against them, this card should not be used unless you combine it with "Alien Mother".
This card works perfect with the "Heart of Clear Water" since it has the correct stats and goes right to defense mode when summoned.