they are practical tools that encourage pacing, reflection, and perspective
Ultimately, this is where I feel like original set foils have the most in common with the Reserved List
Faerie Vandal can grow into a massive flier as we draw extra cards each turn, while Evangel of Synthesis is usually a menacing 3/3 attacker for two that also triggers all of our "draw a second card" creatures when we play it, making it a decent threat and a solid support card
It may have to attack every turn it can, but in exchange you get an indestructible creature and another source of card draw like Squidward's
Nekusar exemplifies what Grixis does best, which is to turn intellect into agony
Against linear combo and ramp decks, Herald does next to nothing