The Emperor of Palamecia // The Lord Master of Hell {U}{R}
Legendary Creature — Human Noble Wizard // Legendary Creature — Demon Noble Wizard
Identity
Izzet
EDHREC rank
#4,345
Cheapest printing
US$0.25
TCGplayer
Printings
2
{T}: Add {U} or {R}. Spend this mana only to cast a noncreature spell.
Whenever you cast a noncreature spell, if at least four mana was spent to cast it, put a +1/+1 counter on The Emperor of Palamecia. Then if it has three or more +1/+1 counters on it, transform it.
//
Starfall — Whenever The Lord Master of Hell attacks, it deals X damage to each opponent, where X is the number of noncreature, nonland cards in your graveyard.
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.