The Peace Card effect is Blocking attacking the Phantom Galaxy...
And that should not be the case; there are not real people behind them. This was the rationale you gave for making the energy cost to attack them 3 instead of two; no one on the other end to revenge you. I saw me (from an hour ago) up on the galaxy and tried to grandfather paradox myself, and couldn't.
Stupid Peace Card, keeping the timeline unsnarled...