Gandalf, Shadow's Foe {5}{U}{U}
Legendary Creature — Avatar Wizard
BlueCommander: legal
Identity
Blue
EDHREC rank
#13,859
Cheapest printing
US$22.29
TCGplayer
Printings
1
Vigilance
When Gandalf enters, exile up to three target lands you control, then return them to the battlefield tapped under their owner's control.
Landfall — Whenever a land you control enters, draw a card and put a +1/+1 counter on Gandalf.
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.