What cards am I talking about
Kraum, Ludevics Opus Kraum, Ludevic's Opus is a popular cEDH partner, which doesnt interest me enough to prattle on about it, but it certainly deserves mention for that crowd of players
Yes, demonstrate triggers when you cast the spell with demonstrate
Anything that lets you filter through 99 cards is bound to help you
Leovold, Emissary of Trest Leovold, Emissary of Trest sees play in formats like Legacy and Vintage, and it was so powerful that it was banned in Commander
Because of mana limitations, you may be unable to play the exiled card before another one is exiled and if you do, you may be prioritizing the exiled card over one in your hand, making this a highly disruptive card for this Final Fantasy deck