Coming in as an 8/8 with flying, haste, and trample, Hellkite Overlord demands an immediate answer, or the game ends in two turns
Creatures like Gelectrode, Walking Ballista, and even Mayhem Devil instantly become deadly when given deathtouch
You're paying Hill Giant mana for a creature with just half the combined power/toughness
Misty Salon is the big payoff here, but it requires a lot of setup to be worthwhile
(Artifacts, legendaries, and Sagas are historic.) It has a tapped ability that gives one blue mana
As loops get more complicated, the chance of making a mistake gets higher, and it's more and more important to be very clear about everything that's happening, ideally keeping track on a notepad for the first iteration in order to make sure you haven't missed anything