Also note that unlike what people think, its ability does not remove it from combat, so your unblocked Ophidian will still draw a card and your Guiltfeeder will force life loss that can kill
(2) If this card is in your GY and you control Ancient Fairy Dragon or a LIGHT Beast, Plant, or Fairy monster: You can Special Summon this card, also you cannot Special Summon from the Extra Deck for the rest of this turn, except Synchro Monsters
#4 As stated in the news story, this was used on Japanese Pokemon cards before Wizards was ever involved
Suddenly, that turn-two Rhystic Study or Smothering Tithe is arriving much later than planned
It's seen some success outside of that
Power has crept a lot since Kaladesh and the introduction of the card type