Forum:Xyz Detaching

This maybe a simple ruling question but I'd like to get this one covered so I know when if this happens again.

If I declare the activation of an XYZ Monster, but have not detached for the activation of the specific XYZ's cost, then my opponent chains cards such as: Veiler, Breakthrough Skill, Fiendish Chain; do I still have to pay the cost of the XYZ monster?

Thank you .:Crack Of Dawn:. (talk • contribs) 13:15, October 13, 2013 (UTC)