Sin, Spira's Punishment {4}{B}{G}{U}
Legendary Creature — Leviathan Avatar
Identity
Sultai
EDHREC rank
#9,370
Cheapest printing
US$0.26
TCGplayer
Printings
4
Flying
Whenever Sin enters or attacks, exile a permanent card from your graveyard at random, then create a tapped token that's a copy of that card. If the exiled card is a land card, repeat this process.
Keywords: flying
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.