Telepathic Mind Weapon:
When your opponent activates a system that you control, he immediately loses 1 command counter from the fleet supply area of his race sheet.
Diplomacy IIa:
Choose one system containing a planet you control. Each opponent must place one of his command counters into the system from his reinforcements.
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Assuming either the Naalu played it themselves or another player in a split system did it… Does this effectively nuke everyone? Causing 1 lost fleet support and potentially destruction of ships all over the galaxy?
Thankfully this hasn't come up in play yet, I imagine it would result in pretty severe diplomatic consequences for whatver player did it hehe.