Mark Hernandez famously finished second in the previous years World Championship, with just a single copy of Sleight of Mind in his sideboard (and just two Adarkar Wastes to cast it)
Rather than being a dead card, this will swell in size by a pair of +1/+1 counters for each opponent who cannot discard
Youd obviously lose out on a lot of combo potential but could fall back on the Felidar GuardianRestoration Angel loop thats far cheaper, even if its a bit weaker
What makes Otrimi, The Ever-Playful great is when it deals combat damage to a player, you can return a creature with mutate from your graveyard to your hand
On the other hand, blue / white are two of the best blink / bounce colors and also offer some of the most powerful planeswalkers, but in the past, if you wanted to take advantage of these synergies, you'd have to go green to play Doubling Season
It can also get you out of a particularly scrappy combat that would otherwise knock you out of the game