Death Baron
Creature — Zombie Wizard{1}{B}{B}2/2
Skeletons you control and other Zombies you control get +1/+1 and have deathtouch. (Any amount of damage they deal to a creature is enough to destroy it.)
Colour identity Black
In short
Death Baron has 10 listed printings; the most valuable is the Secret Lair printing from SLD at US$18.05 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
Every Death Baron printing
Secret Lair

Death Baron
SLD · 1458
TCGplayer market
US$18.05
2018 Convention Promo

Death Baron
PM19 · 90
TCGplayer market
US$15.68
Prerelease

Death Baron
PM19 · 90s
TCGplayer market
US$6.76
Promo Pack

Death Baron
PM19 · 90p
TCGplayer market
US$5.99

Death Baron
FDN · 521
TCGplayer market
US$5.43

Death Baron
M19 · 90
TCGplayer market
US$5.18

Death Baron
MIC · 111
TCGplayer market
US$4.96

Death Baron
ALA · 70
TCGplayer market
US$4.80

Death Baron
HOP · 25
TCGplayer market
US$4.52

Death Baron
FDC · 95
TCGplayer market
US$0.71