"To Solve [condition]" means "At the beginning of your end step, if [condition] and this Case is not solved, it becomes solved." The meaning of "solved" differs based on what type of ability follows it
Some collectors focus on cards that are $10$20 raw and have the potential to be worth $90$150 as a PSA 10
As such, its very collectible, and youll want to check out the card list so you can start chasing them down now
The alt-win package (life total = victory) This is the answer to the Reddit-classic I have 80 life, now what? Felidar Sovereign ($2.43) wins on your upkeep at 40+ life
Izoni, Center of the Web provides similar value and extra board presence via Spiders
Where to View the Card List and Booster Box The official Japanese Pokmon Card 151 set guide explains the original-151 structure, featured Pokmon ex, illustrated cards, Trainer cards, and mirror treatment