Official rule text
54.1 During setup, the custodians token is placed on Mecatol Rex. This a The Titans of Ul’s hero is not purged; it is attached to the token prevents a player from committing ground forces to land on planet Elysium instead. the planet unless they spend six influence to remove the token. RELATED TOPICS: Exhausted, Leader Sheet, Purge, Readied RELATED TOPICS: Custodians Token
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Source: Twilight Imperium: Fourth Edition - Living Rules Reference: Prophecy of Kings
Expansion: Prophecy of Kings
Version: 2.0
Reference: Rule 54.1