The first of those is the amount of damage Irida heals - 40HP is double the potency of the current standard headline items in Potions or Giant Capes (which technically add 20 maximum HP rather than healing it, but effectively function the same way), and is second only to the 50HP potency of Erika, another trainer card which is exclusively usable on Grass-type Pokmon
The first tier in rarity, they wont have any foil or embellishment on them and are pretty easy to find meaning they wont make you all that much on their own
Some are aggressive, others controlling, and some combo off quickly
Artifacts are at 10
Turnaround times (2026 estimates): CGC grade scale: Same 1-10 system as PSA
Following in the footsteps of Throne of Eldraine , the Greek-mythology-inspired set produced powerful cards which eventually saw bans in Standard, Pioneer, and Modern