The one restrictive part of this card is its high mana cost, even though it can be heavily reduced by playing high-power creatures
When life totals are redistributed, each player gains or loses the amount of life necessary to equal the other player's life total
Of course, this card goes best in decks that want to disavow the one land per turn limitation via cards such as Uro, Exploration, Azusa, Risen Reef, or any other land-ramping cards that run rampant through Commander
The redirect scenario allows you to take control of your targeted spell similarly to how other cards like Commandeer do, but Invert Polarity also hits creature spells if you want to steal something
Blizzard Brawl is an objectively better version of Prey Upon, and any deck with enough snow permanents will make it shine brightly
Creatures like Offender at Large, Essence of Antiquity, and Vengeful Creeper will punish you for guessing wrong