Their grading scale ranges from 1 / Poor to 10 / Gem Mint
If you are thinking about what deck to build next and have gems to spare, please try challenging yourself with a Scareclaw deck.
(1) When your opponent activates a Spell/Trap Card, or monster effect, and you control a Machine T.G. monster: Negate the activation, and if you do, destroy that card
That said, the card is still one of the absolute most busted cards in Vintage
In the mainline games, Kyogre's role as a legendary Pokmon is pivotal
To summon monsters using Synchro Summoning, you have to have the tribute materials on the monster field - and at least one of those materials has to be labelled as a Tuner monster in the monster description