Try thinking about the buying/selling pace that would match your personality (modern, mid, vintage, slow, fast, English, Japanese) and then finding a single set, or even a single Pokmon or single card that matches
To help determine the rarity, examine your cards carefully
During one particularly gruelling match using the Theros: Beyond Death set on Magic: The Gathering Arena, I was shocked when my White-based opponent placed the Shatter the Sky spell down
Arcane Bombardment's effect is random for what it copies, but you don't actually have to pay the mana cost of the spells being copied so it's not uncommon to cast a ton of spells every turn
Admittedly, this effect doesnt come cheap, as X needs to be over 10 in order to activate this effect
The search and filtering experience for slabs is clunky, and the buyer pool for graded cards is much smaller than for raw singles