This was all part of the setup Wolfman and the staff of DC Comics planned for the Crisis, showing the Monitor currying favor with villains such as Maxie Zeus, prior to calling on the heroes.

The Monitor went so far as to provide supervillains with technology, supposedly for money but in reality as a way to test the heroes and villains of Earth and find out which ones might help his cause.

When the Anti-Monitor's antimatter wave began approaching the main Earths of the Multiverse, the Monitor directed Harbinger to track down an initial force of fifteen specific heroes and villains the Monitor needed to fight his foe (this initial group featured Superman, Doctor Polaris, Dawnstar, Firebrand, Geo-Force, Obsidian, Cyborg, Killer Frost, Firestorm, Psycho-Pirate, Solovar, Blue Beetle, Psimon, Green Lantern, and Arion).

He explained to them what was going on and sent them to protect giant tower-like devices that he had created on several places across space and time; his plan was to merge the surviving Earths into a single one that could resist the Anti-Monitor's attack.

He left Lyla a recorded message explaining this, trusting that she and the Multiverse's heroes would complete the job and preserve the worlds before their vibration slowed down to an extent where they would destroy each other as they existed in the same place simultaneously.

Harbinger followed the Monitor's legacy, using up her powers to draw the last three Earths (Earth-Four, Earth-S, and Earth-X) into the Netherverse.

These actions resulted in a "reboot" of the multiverse as a single universe, creating an amalgam of the five surviving Earths which possessed the strength to resist the Anti-Monitor's attack.

As a result of there being worlds with different histories, the Monitors now work as a collective to prevent interaction between the universes that could lead to a new Crisis.

[8][9][10] In the DC Rebirth relaunch, the Monitor, the Anti-Monitor, and the World Forger were created by Perpetua to guard the positive and negative universes.

He was able to save Pariah (and possibly empower him to never die and be always drawn to where the Anti-Monitor was about to strike next) and create an entire satellite headquarters out of nothingness.