Stenn, Paranoid Partisan {W}{U}
Legendary Creature — Human Wizard
Identity
Azorius
EDHREC rank
#7,655
Cheapest printing
US$0.30
TCGplayer
Printings
5
As Stenn enters, choose a card type other than creature or land.
Spells you cast of the chosen type cost {1} less to cast.
{1}{W}{U}: Exile Stenn. Return it to the battlefield under its owner's control at the beginning of the next end step.
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.