You can ramp, sacrifice to a Goblin Welder or bargain ability, and loads more
Having cards like fetches and Cultivates means that youll spread a lot of counters, and in the late game you can start doubling those counters
list prices and sales at this level seem to be confined to TCGPlayer only during that few weeks of time
Legality depends on the tournament format -- Head of the Class can be legal in some formats and banned or restricted in others
Red can help you KO 150 HP Pokemon like a fresh Giratina ex, while Giovanni can help Arceus ex OHKO Meowscarada
But frankly, Im most bothered by how its impossible to run anything but a terrible deck from start to finish, because the game provides no means of obtaining your desired cards other than to endlessly farm and crack booster pack after booster pack and hope for good fortune