I could show you a morph card, for example, and then play one on the next turn
This doesnt help him stand out among the large number of exciting legendary creatures on offer
If you're playing against a person that you know is playing Chaos Orb (which would be an incredibly rare sight given that the card is not only rare and expensive, but is also illegal in every format except for non-sanctioned games), then you could possibly take advantage of these quirks
Edgars a great support piece for coin-flip shenanigans
This could be a true toolbox tutor and allow you to have a way to get synergistic combo pieces like Kiki-Jiki, Mirror-Breaker and Acidic Slime rather than Kiki-Jiki and Zealous Conscripts in matches where your opponents couldn't handle a "fair" combo like that, or wrap the game up when doing so was either fair or necessary
These sorts of shenanigans seem too awesome to actually be real, though, so I doubt itll happen much outside the causal room on Magic Online