Geralf, Visionary Stitcher {2}{U}
Legendary Creature — Human Wizard
BlueCommander: legal
Identity
Blue
EDHREC rank
#5,436
Cheapest printing
US$0.69
TCGplayer
Printings
4
Zombies you control have flying.
{U}, {T}, Sacrifice another nontoken creature: Create an X/X blue Zombie creature token, where X is the sacrificed creature's toughness.
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.