No, some are just pointy-eared mana finders like Greenseeker, or blunt-eared mana reanimators like Groundskeeper or even Snake-eared mana boosters like Sakura-Tribe Scout
A 3/4 angel with flying that costs one red and two white, her entire gimmick is that any spell you cast that targets a creature you control gets exiled once it resolves
You want to ramp into it more than any other card not just because of its awesome offensive power, ramp and value assuming all goes well but because it keeps you in the game when all goes tits up
You really want to be able to cast your cards, so if your deck is full of high-CMC cards, you must build the rest of the deck to help do that
Baeloth Barrityl, Entertainer | Illustration by Joshua Raphael There are over 80 total commanders for players to test and try out in Commander Legends: Battle for Baldurs Gate
Your cards like Nissa, Vastwood Seer and Shrine of the Forsaken Gods are surely enabled, no matter how much mana was created first from creatures like Rattleclaw Mystic