In the old days, the baseline for mana rocks was to actually produce mana the turn they came into play, like Mana Vault, Mana Crypt, the Moxen, and Grim Monolith
It's not even that Commander cards shouldn't be printed in Standard sets - it's fine to have a smattering of them - but with so many supplemental products out nowadays, it's almost disappointing to feel as though Commander is still the focus
Casting an Adventure is very similar
Yorion, Sky Nomad This card, on the other hand, is very good
I pretty much put Blackblade Reforged in almost all of my Commander decks, but itll be even better than normal here where there will be so many lands on the battlefield
There are some cards that arguably arent worth playing without fetchlands, like Life from the Loam and Field of the Dead