One of my absolute favorites is my 'Deep Blues' page
Thats thanks to the Rush keyword on the Rafiki, Mysterious Sage card, which allows the three-ink card to challenge immediately on the same turn its played
Grading typically costs $15-$75+ per card depending on service tier, so it usually only makes sense for cards worth $100+ raw or near-perfect copies of mid-value cards
As you mutate creatures on top of one another, you will generate a ton of value by creating creature tokens, summoning creatures for free, tapping down your opponent's creatures, fetching lands, bouncing opposing creatures, etc
Whenever it feels that its getting samey, you get a nice chunk of something new and exciting to keep you going