mystery cards mtg Arcanum Things [Mystery Booster 2 Playtest Cards] MTG Mystery Bundle - 850+

It doesnt actually do anything that requires props or flies in the face of the games normal rules, so it might be the easiest to sneak into your Commander deck

World This is a supertype that only applies to enchantments

Leyline of Sanctity In my opinion, its the best solution if the metagame is infested with Endurances

Blowing up one nonblack creature, then immediately blowing up another without expending any mana keeps our mana pool fresh so we can continue to flashback more and more destruction from our graveyard

This is extremely profound, especially given how these cards are going straight to Modern, skipping Standard entirely