Not sure where to put this question, but this came up in a conversation, and I think it has to due with rulings as much as it has to do with playing the game.
Anyway, the situation goes something like this: Your opponent casts a saccable enchantment or artifact, like Pernicious Deed or Engineered Explosives. You have a Kgrip in hand and stuff you'd like to protect. The next time you get priority, you're going to blow it up.
Your opponent doesn't want to pop it right now (would rather wait until the end of your turn or just leave it in play to discourage playing further cards), but would gladly destroy it if he knew it was about to get gripped.
After resolving the Deed, your opponent makes another play in the same mainphase. In the scenario, it's a play that makes it far more critical to Kgrip the Deed immediately (like they cast Sterling Grove, for instance).
If you say, "Ok" it's understood that your opponent passed you priority and you passed back, resolving the Sterling Grove. That sucks. According to the rules as I understand it, you can't say, "Ok" to "trick" someone into passing you priority (for the same reason that you can't cast Cabal Therapy and say "Tarmogoyf" and then change the name to Force of Will when they pass back). So you couldn't go like, "Ok" and then when they reach to put the Grove into play, you go, "Wait, before it resolves Kgrip the Deed."
If you say something like, "Do you pass priority?" It's now obvious that you're holding a Kgrip and he should immediately pop the Deed.
The only thing I can think of is pretending to think. But if you're playing a deck without countermagia for the Sterling Grove, it should be obvious to any player used to seeing Kgrip that you're probably holding a Kgrip.
Or another situation: Your opponent has 20 mana open. You have trickbind open and they have a Sacred Mesa and it's during your combat step. This actually happened in a game. If they go like, "Make 4 tokens." It's ambiguous like did they make one, try to resolve it, make one more, try to resolve it, or did they go all out.
If you ask, "Are you doing those one at a time?" Any idiot could see the trickbind (or Kgrip) broadcast and go, "Uhm, no, and instead of 4 tokens, I'm making 10 tokens all on the stack, then I pass priority."
Enchantress is a deck that probably should have just done that at the end of its turn to play around Trickbind, but it's quite reasonable that people only make the tokens they need to block, then make the rest at endstep (due to training that you're supposed to do everything endstep to avoid giving people info, even though Enchantress has no instants anyway).
What do you do in those situations? Basically how do you make sure that your opponent actually passed you priority without broadcasting that you have a split second card.
My friend's suggestion was just to ask if your opponent passes priority on a regular basis. I think this is very boring, and I don't see anybody else doing it. But at the same time, if I'm running Kgrip in any deck, I want to be able to cast it without revealing its presence beforehand, because that could lose games (even if not in as fantastic a fashion as the two scenarios above).
I dunno, when Wizards ruined the game by making Split Second, did they happen to unruin it by at least making a rule so that the person with the split second card isn't broadcasting it everywhere?