whenever a player discards a card mtg Can I choose the discard with Syphon Mind? Top 10 Best Discard Spells

Jeskai Flashback: Jeskai Flashback seems like it can be upgraded into a reasonable control deck, although it comes with a lot of risk: if your opponents play graveyard hate (and most experienced Commander players have learned that you should try to fit at least some into every deck), you could get locked out of the game altogether

Destroy target creature or planeswalker with mana value 3 or less

Any "as [this permanent] enters the battlefield" or "[this permanent] enters the battlefield with" abilities of the exiled card will also work

Even outside that ideal scenario, you can leverage a 2-mana board wipe that attacks lands and the hand in many situations

For a small cost, it makes your opponent mill seven cards, packing quite the punch

The evil sea witch Ursula has been unleashed and uses all her powers to become sole ruler of everything and everyone in Lorcana