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You win immediately by occupying three strongholds at the end of any turn; that is the primary victory condition (p.6).

When the storm moves onto forces it can damage or remove them per the Storm rules, and sectors occupied by the storm block movement — you cannot move through a storm-occupied sector (pp.7, 9).

If a sandworm appears at a Spice Blow it removes non‑Fremen forces and prevents passage through that area; Fremen have special sandworm/movement interactions described on their faction sheet (pp.8, 16).

Bidding during the Treachery phase follows the procedures and limits specified for that phase (p.8); during battles you may play legal Treachery cards from your hand as allowed by the combat rules (see pp.10–11).

During Revival you may revive up to three forces (maximum), and reviving leaders requires spending spice as indicated by the Revival rules (p.9).

Being in a Nexus/ally relationship doesn't by itself stop you from winning by taking strongholds, but alliances affect movement, victory interactions, secrecy and bribery according to the Nexus rules (formation, breaking, effects and secret/bribery rules are on p.12; optional alliance variants on p.24).