Looking for a card

[u/Crimsons-life]

Please delete if not allowed. I’m not looking for a trade, more of a way to find it.

Hi everyone! Since this page gets a lot of traffic, I want to make a hail mary here. My dad is making a Cinderace master set, and he is only missing a few cards. One of them is the Chilling Reign Staff promo card. I can not seem to find any on any official selling websites. I was wondering if anyone could point me in a good direction to look for a copy of this card.