The most recent commons sheet I reconstructed was Evolving Skies and it is a 121 card sheet just like earlier sets
If the total mana value of historic permanents you control changes while activating mana abilities (probably because you sacrificed one or more historic permanents), the cost to cast Excalibur remains what you previously determined
Lets instead amend that, remove the identity restriction, and look for more than just flying: This is a beefy search, but you can see encapsulated within the brackets is an OR condition
Coupled with the fact you can play it as your commander and get value if people try and target you makes Limited Resources Locking each player to five lands forever is extremely constraining and not that much fun, all for a single mana
Thanks to the rounded down wording, your opponent is always left with at least one creature, so they can always keep their best creature alive
A side collection of mine is an obscure Japanese set called Adventure Cards