Moritte of the Frost {2}{G}{U}{U}
Legendary Snow Creature — Shapeshifter
Identity
Simic
EDHREC rank
#6,417
Cheapest printing
US$0.24
TCGplayer
Printings
3
Changeling (This card is every creature type.)
You may have Moritte enter as a copy of a permanent you control, except it's legendary and snow in addition to its other types and, if it's a creature, it enters with two additional +1/+1 counters on it and has changeling.
Keywords: changeling
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.