Stella Lee, Wild Card {1}{U}{R}
Legendary Creature — Human Rogue
Identity
Izzet
EDHREC rank
#5,188
Cheapest printing
US$4.67
TCGplayer
Printings
1
Whenever you cast your second spell each turn, exile the top card of your library. Until the end of your next turn, you may play that card.
{T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only if you've cast three or more spells this turn.
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.