Vial Smasher the Fierce {1}{B}{R}
Legendary Creature — Goblin Berserker
Identity
Rakdos
EDHREC rank
#5,404
Cheapest printing
US$2.95
TCGplayer
Printings
5
Whenever you cast your first spell each turn, choose an opponent at random. Vial Smasher deals damage equal to that spell's mana value to that player or a planeswalker that player controls.
Partner (You can have two commanders if both have partner.)
Keywords: partner
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.