Demon rune

The demon rune is an item in the 2016 Doom reboot which occurs only during multiplayer game play. It appears as a floating red pentagram with a set spawn point. It transforms a player into one of several powerful demons when touched.

Tactical details
When taken, the player who obtains the demon rune will be transformed into a demon they selected before the match. This transformation lasts for a total of 60 seconds, after which the player will revert to his or her human form if they have survived. Although each demon is powerful in its own right, it is possible for enemy players to kill the player who has become the demon, and doing so will cause the demon rune to drop, where it can be collected by any other player to transform and lay waste to his or her enemies.

The demon rune will otherwise eventually respawn, with its reappearance announced verbally to all players in the game 15 seconds beforehand with the message, "Demon rune spawning in 15 seconds."

The Gauss cannon and the BFG are primarily meant to exist as counters to those empowered by the rune.

Demons
The demons currently available for use, in order of unlocking for the base game, are listed below. Owning the packs for the game, or playing in a match with another player who owns them, makes additional tranformations available.

Base game

 * Revenant (unlocked by default)
 * Baron of Hell
 * Mancubus
 * Prowler

Unto the Evil DLC

 * Harvester

Hell Followed DLC

 * Cacodemon