Think of it like a conditional Xget the basic deal for cheap, or sink more mana into extra value if you draw it late
With 1,100 employees losing their jobs over the next six months, these certainly arent happy times
Celestial Armor is trying to fulfill too many roles at once and doesnt succeed at any of them for the mana cost
I tend to use Mental Misstep for late-game counter wars where it counters things like the elemental blasts, Veil of Summer, Dispel, Silence, and the like
Cunning Wish, meanwhile, also sees a ton of play in Legacy and Premodern for its ability to find interaction in the sideboard that may not normally be played in the main deck of streamlined Omniscience decks, like Force of Negation, Surgical Extraction, or Consign to Memory
You can play explore cards that let you hit your land drops more efficiently, it helps to play 3+ colors or expensive spells, it sets your graveyard for shenanigans, and much more