The commonly accepted norm is 37 lands, but I like to modify this based on the average converted-mana-cost (CMC) of my playables
In addition to the creature stuff, they often buff allied creatures or exile opposing permanents
This card is an example of the holy grail-esque shadowless Charizard, whose pricelessness derives from a printing error that omitted the big lizards shadow from its artwork
That said, once you play the deck a few times, feel free to add or subtract lands to the deck depending on personal preferences, but 28+ commanders value is the best starting point for discovering how many lands in a commander deck
Spymasters Vault has: Pay ,: Target creature you control connives X, where X is the number of creatures that died this turn
With their expert diplomacy and ability to see far into the uncertain future, the Elven Council deck brings together even your opponents to sway the enemy forces in your favor