The Lord of Pain {3}{B}{R}
Legendary Creature — Human Assassin
Identity
Rakdos
EDHREC rank
#2,467
Cheapest printing
US$10.71
TCGplayer
Printings
1
Menace
Your opponents can't gain life.
Whenever a player casts their first spell each turn, choose another target player. The Lord of Pain deals damage equal to that spell's mana value to the chosen player.
Keywords: menace
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.