Tome of the Cosmic Echo - a collection of subclasses

January 20, 2026

Publisher: Dungeon Masters Guild

Hey there! Ready to shake up your game with the literal threads of the universe? The Tome of the Cosmic Echo is a collection of subclasses designed for players who want to manipulate time, gravity, and the void. Whether you're hunting down timelines or channeling the heat of a supernova, these options are all about bringing celestial majesty to your character.

Just a quick heads-up for the DMs out there: I made these subclasses for maximum fun and flavor, which means they aren’t always perfectly balanced for every campaign. Options like the School of the Ritual Weaver are definitely "high-octane" and experimental, essentially turning slow rituals into instantaneous combat power. I recommend using them with a bit of caution and chatting with your group to make sure they fit your table's power level and playstyle.

Here’s a quick look at the cosmic power waiting inside:

Firmament Blade (Fighter): A dual-wielding master of "Sun" and "Moon" blades who uses rhythmic strikes of fire and ice to dictate the flow of battle.
The Harbinger (Rogue): An entropic specialist who views enemies as timelines to be concluded, marking them for a necrotic end and even "reversing" time to teleport.
Oath of the Inevitable (Paladin): A "Warden of Finality" who acts as the hand of fate, ignoring difficult terrain and crushing foes with force-powered smites.
Way of the Resonant Soul (Monk): A martial artist who treats an enemy's strike as kinetic fuel, catching incoming energy and redirecting it as devastating force.
School of the Ritual Weaver (Wizard): An experimental archetype that treats rituals as fluid combat art, using allies as "Ritual Nodes" to power massive effects in real-time.
Sidereal Sentinel (Fighter): A spear specialist who uses Celestial Katas to master gravity and light, striking with the reach of the heavens themselves.
The Sun Eater (Warlock): A servant of the absolute void who manifests miniature singularities to swallow enemy magic and pull foes into an event horizon.