Rikku, Resourceful Guardian {2}{U}
Legendary Creature — Human Artificer
BlueCommander: legal
Identity
Blue
EDHREC rank
#3,772
Cheapest printing
US$0.29
TCGplayer
Printings
4
Whenever you put one or more counters on a creature, until end of turn, that creature can't be blocked by creatures your opponents control.
Steal — {1}, {T}: Move a counter from target creature an opponent controls onto target creature you control. Activate only as a sorcery.
Keywords: steal
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.