James, Wandering Dad // Follow Him {2}{U} // {X}{U}{U}
Legendary Creature — Human Scientist // Instant — Adventure
BlueCommander: legal
Identity
Blue
EDHREC rank
#8,727
Cheapest printing
US$0.30
TCGplayer
Printings
4
{T}: Add {C}{C}. Spend this mana only to activate abilities.
//
Investigate X times. (Then exile this card. You may cast the creature later from exile.)
Keywords: investigate
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.