Official rule text
9.5 Abilities can cause a system to be two different anomalies; that attached to that planet card and remove the corresponding system has the properties of both anomalies. attachment tokens from the game board. RELATED TOPICS: Asteroid Field, Gravity Rift, Movement,
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Source: Twilight Imperium: Fourth Edition - Living Rules Reference: Prophecy of Kings
Expansion: Prophecy of Kings
Version: 2.0
Reference: Rule 9.5