The problem with Ancient Tomb is that two damage isn't a lot, especially in Commander where you start with 40 life
Your opponent is then unable to cast spells, while you use artifact mana and low casting casts to slowly escape from jail and take control of the game while keeping your opponent locked down
If your Commander deck has two commanders, you can only include cards whose own color identities are also found in your commanders' combined color identities
However, I also know that when I got to running the full playset of Elvish Reclaimers , I also went all the way up to 24 lands in my maindeck as the power of Elvish Reclaimer is in its ability to fetch for utility lands, especially by the second turn, and hence you need those cards in order to make an impact with Reclaimer
Codie, Vociferous Codex Codie, Vociferous Codex makes for a fun and exciting spellslinger deck