At first I thought Chameleon would have no effect on cards like Peddler or Merchant, but then I realized that Chameleon would allow it to override Enchantress, as mentioned in the first post about Ways "Enchantress is a lot like a Way. The main thing is that you can beat Enchantress by doing the Way instead." So, normally there'd be no effect, since there's no practical difference between +1 Card +1 Action +$1 and +$1 +1 Action +1 Card, but if it's your first card with an Enchantress attack in play, it overrides Enchantress!