The vigilance and third act are all but wasted if this is purely a defensive card
Fate included 18 cards that manifest, and Dragons of Tarkir included one card that mentioned the ability but didnt actually manifest anything itself
From what we can tell, these will work similarly to how past Japanese and Phyrexian cards have worked, meaning there will be card styles you'll need to collect
Aether Storm in Homelands had the text: No summon spells may be cast. In future reprints, it changed to creature spells cant be played. The first version of Future Sight stated that you can play the top card of your library. This terminology caused some confusion because play has multiple meanings: in play, play a card, play with the top of your library revealed, and so on
Glitches and Technical Issues Like any app or website, simulators can have technical hiccups
These cards are fantastic in Reanimator anyway, as ways of dodging exile-based removal, so including them isnt a stretch