Overseer of the Damned is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Flying When this creature enters, you may destroy target creature. Whenever a nontoken creature an opponent controls dies, create a tapped 2/2 black Zombie creature token.

Complete guide

Overseer of the Damned is a powerhouse Demon that commands the battlefield by removing threats and raising an army from their remains. This seven-mana flyer is a staple for black decks looking to turn every enemy death into a tactical advantage.

A Deadly Entrance

When Overseer of the Damned enters the battlefield, you can choose to destroy any target creature. This is an optional 'may' ability, meaning you aren't forced to destroy your own creature if your opponent has no board. If the target is a nontoken creature controlled by an opponent, its death will immediately trigger the Overseer's second ability to create a Zombie.

Raising the Horde

The second ability is a triggered ability that looks for nontoken creatures your opponents control dying. For every such creature that hits the graveyard, you create a 2/2 black Zombie creature token that enters the battlefield tapped. This happens regardless of how the creature died—whether it was through combat, a sacrifice effect, or a destruction spell.

Common Mistakes

One common error is trying to generate tokens from token creatures; the ability explicitly specifies 'nontoken creature.' Additionally, remember that the Zombie tokens enter the battlefield tapped, so they cannot be used as immediate blockers during the same turn cycle they are created.

When to Play It

Overseer of the Damned is best played when your opponent has a high-value nontoken creature you need to remove. Because it provides a 5/5 flying body, a destruction effect, and a potential token all for one card, it is an excellent tool for stabilizing the board in the late game.

Interaction examples

Continuous Sacrifice

Sheoldred, Whispering One

At the start of your opponent's upkeep, Sheoldred, Whispering One forces them to sacrifice a creature. If they sacrifice a nontoken creature, Overseer of the Damned triggers, granting you a tapped 2/2 black Zombie token. On your upkeep, you can use Sheoldred to bring the Overseer back if it was destroyed, repeating its enters-the-battlefield destruction effect.

Mass Extinction

Massacre Wurm

If you control Overseer of the Damned and play Massacre Wurm, the Wurm gives all opposing creatures -2/-2. If multiple nontoken creatures die from this toughness reduction, Overseer of the Damned will trigger for each one, creating multiple tapped 2/2 Zombie tokens while your opponent loses 2 life for each death due to the Wurm's ability.

Solo Efficiency

You cast Overseer of the Damned and target an opponent's nontoken creature with the enters-the-battlefield ability. The creature is destroyed and put into the graveyard. Overseer of the Damned's second ability then triggers, placing a 2/2 black Zombie token onto the battlefield tapped under your control.

Guide written with AI from the official text and rulings. Official English text prevails.