CoC aren't even that dependable in blue eyes generally.
It need specific dragon tuner which is USELESS if you cant draw or add them in the first place, and it is a rather COMMON HAND in BE where you cant had both of them instantly.
Trade-in might be worth limiting tho due to BE deck nature, but not this card OFC
Coc cost by discarding tuner and draw 2 cards, but what makes it good is that the discarded card can activate its effect when being discarded so basically there is no drawback in coc (the same thing with cup of ace)
Cup of ace relies on skill, coc relies on tuner but the tuner can activate its effect, so it's the same (just my opinion, and polite reply please)
"It is fun to see third rate duelists screaming about nerfing this deck" well im 5 times kog player and will be at wcs qualifier so ur wrong .and not complain and screm but legit address issue what i do u 🔥 .stop trying to discredit the addresses by saying they are the third rate as its obvious u use these unfair broken decks so ur the third rate if you need that to win.