I can’t post the screenshot I took but I used the 5 mana 6/5 from timeways to put a card on top of my deck and reduce it’s cost by 5, when I drew it the next turn it’s cost had not been reduced.
I genuinely cannot figure out what card you are even referring to
You didn’t even provide the info of what class you were playing
I searched every 5 cost card from timeways and couldn’t find a card that matches what you describe