vintage base set pokemon cards 2 Complete Master Set (130/130) 2000 Base Set (Pokémon) - Wikipedia

Karns Bastion allows you to proliferate any and all of these counters that you desire

If you are considering Pokmon cards as an investment, you need to internalise every 1 of these risk factors: Extreme price volatility with no fundamental floor

This means that a Lightning deck cant search using Brooklet Hill not even just to shuffle their deck - since there are no Basic Water or Fighting Pokmon in the format that could be in a Lightning-type deck

Your commander and background choice is made during the deck building process, whether that be during a Commander Legends draft or when building a more traditional Commander deck