In the case of two of them, Astral Slide and Lightning Rift, they spawned tournament-level decks
This means that if you cast a spell with demonstrate and both you and an opponent copy it, the opponent's copy will resolve first, then your copy will resolve, and finally the original spell will resolve
Read More: The 10 Best MTG Control Commanders 3 Syr Gwyn, Here of Ashvale Syr Gwyn, Hero of Ashvale is a six mana Red, White, and Black 5/5 with vigilance and menace who is very specifically good in a deck filled with Equipment cards and Knights
#9 Deep Clue Sea I talked about how to upgrade Deep Clue Sea earlier this year, but I think its one of the best preconstructed decks of the year, and the best of the Murders at Karlov Manor ones
With a renewed interest in cards that said win the game on them, I remembered Jace, Wielder of Mysteries was available