How can I use this amulet?

Hint 1 of 5:

You will want to WEAR it, after you know the command word.

Hint 2 of 5:

Don't read on until you have the wine bottle.

Hint 3 of 5:

You may want to reread the descriptions of the amulet and the wine bottle.

Hint 4 of 5:

The amulet's description talks about  "red swirls" obscuring green runes, and
"you can see right through" the bottle of red wine.

Hint 5 of 5:

LOOK THROUGH THE BOTTLE AT THE AMULET.  This gives you the command word.