Xavier Sal, Infested Captain {B}{G}{U}
Legendary Creature — Human Fungus Pirate
Identity
Sultai
EDHREC rank
#9,014
Cheapest printing
US$1.29
TCGplayer
Printings
2
{T}, Remove a counter from another permanent you control: Populate. Activate only as a sorcery. (Create a token that's a copy of a creature token you control.)
{T}, Sacrifice another creature: Proliferate. Activate only as a sorcery. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Keywords: proliferate, populate
Every printing
highest TCGplayer market first; a card with only a thin single listing shows its low
In short
A Commander deck is a commander and 99 other cards, one copy of each (except basic lands), all inside the commander's colour identity. Paste a full list into the deck price calculator to price it and check it against the format.