So key charge states loose 1 Amber then forge a key at current cost does this imean if I have 4 Amber loose one go down to 3 then pay the 3 to forge a key

Or is it saying loose 1 Amber you have then pay the cost of making a key which would be 6

Lose one Æmber, then forge a key at 6 Æmber +/- modifiers that may be in play (Lash of Broken Dreams, Titan Mechanic, Murmook, etc.)

Note that losing the Æmber is NOT optional, so if you don't have enough to forge the key, you wouldn't want to play this.

Play: Lose 1[AE]. If you do, you may forge a key at current cost.

Thank you