Alora, Merry Thief {2}{U}
Legendary Creature — Halfling Rogue
BlueCommander: legal
Identity
Blue
EDHREC rank
#10,846
Cheapest printing
US$0.17
TCGplayer
Printings
3
Whenever you attack, up to one target attacking creature can't be blocked this turn. Return that creature to its owner's hand at the beginning of the next end step.
Choose a Background (You can have a Background as a second commander.)
Keywords: choose a background
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.