Chalice of the Void XX
Types:
Artifact
Card Text:
Chalice of the Void enters the battlefield with X charge counters on it.
Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.
"Hypothetically", I'm playing Shops vs a solid Vintage player playing counterspells and answers. I have Chalice of the Void with 2 charge counters and not much else going on. I draw a Sphere of Resistance which is worthless right now, because of my Chalice. I want to make my opponent make a bad play and waste a card on my Sphere of Resistance.
I announce my Sphere of Resistance, pay for it, and dramatically place it on the stack in between us and ask "I play this super scary Sphere of Resistance, would you like to counter it, sir?" He looks at his hand, looks at the sphere, looks at me, I embelish "all your spells will cost one more if it resolves." He thinks for maybe 15 seconds (long enough for me to take a pic of the gamestate), I cross my fingers and hope for the best. He says it's fine, you can have your sphere. I say "dang it!" and put it into the graveyard, probably pointing to sphere as I do it. I say, "It might have worked. It might have...".

Is anything with this line of play wrong? Is it cheating? Or do the rules say that I would have to Announce and play Sphere of Resistance, then immediately point to my Chalice and say, oh, that is on the stack. Would you like to counter my Sphere?
There are plenty of opinions on a play just like this in the latest Eudemonia Vintage tourney thread, and people are welcome to share their opinions there, as that is much a community issue.
Here is that threadThis thread is for Judges to settle.
Thank you very much for your time.