While the idea of casting this to deal with early threats is thrilling, if it is at home in an energy-centric deck, there's also the chance that it could kill a creature of nearly any size later in the game, and still for a single red mana
Hired Heist: Blue restriction, and an useful effect
You can even block to soak up damage and then before damage, sacrifice this to a Deadly Dispute or Reckoner's Bargain for extra value
They primarily give permanents keywords like protection, indestructible, and hexproof, though the best of them phase out your permanents
But this write-up wouldnt be complete without mentioning the biggest, baddest cycler of them all
Say that three times fast