Wilhelms actions.

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Move Action:Thumbtwiddlin
Standard Action: Drop a fog cloud between the two ships 21 feet above the ramps. Its a 20ft radius burst, and I'm trying to cover as many of the boarding ramps, and as much of their ship as possible. Leaving one foot between the bottom of the mist and the ramps.
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A bank of fog billows out from the point you designate. The fog obscures all sight, including darkvision, beyond 5 feet. A creature within 5 feet has concealment (attacks have a 20% miss chance). Creatures farther away have total concealment (50% miss chance, and the attacker can’t use sight to locate the target).

A moderate wind (11+ mph) disperses the fog in 4 rounds; a strong wind (21+ mph) disperses the fog in 1 round.

The spell does not function underwater.

The fire will continue to burn for another 2 rounds.