How to get Artaglio's cunning ? - problems

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Hello,
I have some problems with Artaglio...
After I drunk with him and win, I convinced him to face the mouth, several times (persuasion, retribution for drinking or to bringing him the banner), but each time, the mouth eat him, but I can't find any ghost in the calm (or anywhere).
Can someone help please...

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Solved :
My apologies, I was misled when by reading something about Artaglio's cunning and I was expecting finding him close to the maw just after he "entered"... I didn't realized I will found him far later ... This took me 2 hours to realize it ...