Y'shtola Rhul {4}{U}{U}
Legendary Creature — Cat Druid
BlueCommander: legal
Identity
Blue
EDHREC rank
#2,474
Cheapest printing
US$4.98
TCGplayer
Printings
4
At the beginning of your end step, exile target creature you control, then return it to the battlefield under its owner's control. Then if it's the first end step of the turn, there is an additional end step after this 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.