Ivy, Gleeful Spellthief {G}{U}
Legendary Creature — Faerie Rogue
Identity
Simic
EDHREC rank
#6,118
Cheapest printing
US$0.32
TCGplayer
Printings
5
Flying
Whenever a player casts a spell that targets only a single creature other than Ivy, you may copy that spell. The copy targets Ivy. (A copy of an Aura spell becomes a token.)
Keywords: flying
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.