For an example bug that I ran into often: at my local League, we have a large enough tournament turnout that we need to use match slips to make result entry manageable
What I really enjoy here is the lifelink and deathtouch, like the Vault of the Archangel activation
For example, a holographic Dark Charizard card that was signed and doodled on by artist and Pokmon co-creator Sugimori was sold at an auction for over $13,000 (11,036) earlier this month
Make Them Have It/Fade If your opponent is repeatedly representing a powerful defensive card, sometimes your only real option is to call their bluff
In general, I would guess its more likely to be found in a B/W deck, taking advantage of stuff like Silkwrap, or Abzan with its Charge and Anafenza (at least in Standard)
Rather, a second "reflexive" ability triggers when you pay this way