Legendary Creature — Elemental Warlock

Eris, Roar of the Storm

Mana value10EDHREC#5,864

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The Commander

This spell costs {2} less to cast for each different mana value among instant and sorcery cards in your graveyard.

Flying, prowess

Whenever you cast your second spell each turn, create a 4/4 red Dragon Elemental creature token with flying and prowess.

Guide

Gameplan

Cast cheap instants and sorceries to build a graveyard with diverse mana values (making Eris cheap to recast), and chain two spells per turn to spit out a swarm of 4/4 flying prowess Dragons. Each Dragon also has prowess, so every subsequent spell pumps your whole flying board into a lethal alpha strike. You play a controlling spellslinger game early, then close fast once Eris and a few Dragons are online.

Strengths

Generates a wide evasive board of 4/4 flyers with prowess that scale explosively with spell volume
Eris becomes nearly free to recast, shrugging off removal and making commander damage easy
Prowess on Eris and tokens turns cheap cantrips into burst damage and combat blowouts
Deep card-quality engine from playing lots of instants and sorceries keeps gas flowing

Weaknesses

Token swarm folds to a single board wipe and you can fall flat without follow-up
Needs to reliably cast a second spell each turn—mana droughts shut off the Dragon engine
Light on early defense; aggressive decks can race you before Eris stabilizes
Two-color Izzet means no access to broad removal or efficient ramp/recursion outside artifacts

Key Cards

Young Pyromancer — Doubles down on the second-spell payoff by flooding extra bodies that all benefit from prowess pumps.
Underworld Breach — Recasts instants and sorceries from the graveyard to fuel multiple second-spell triggers and combo turns.
Murktide Regent — Another graveyard-fueled flying threat that scales with your spell-heavy yard alongside Eris.
Storm-Kiln Artist — Treasure generation lets you chain multiple spells per turn to repeatedly trigger Eris.
Thousand-Year Storm — Each additional cast copies your spells, exploding both Dragon count and prowess triggers.
Mizzix's Mastery — Recurs a big spell while feeding the graveyard, and helps stretch into a second cast each turn.

Upgrade Path

Add fast mana and ritual effects (Jeska's Will, Dockside Extortionist, Mana Crypt) so you reliably cast two-plus spells per turn and bring Eris back cheaply. Tighten the curve toward efficient cantrips with varied mana values to maximize her cost reduction, and add protection like Veil of Summer, Heroic Intervention, or counterspells to shield the swarm from wraths. For a higher ceiling, lean into Underworld Breach plus Storm-Kiln Artist loops for explosive storm finishes.

Core Cards

The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.

Win Conditions

▸Alpha strike with a wide board of flying Dragons buffed by prowess from a single turn's spells
▸Commander damage from a cheap, evasive Eris with prowess pumps
▸Burn-out finishers like Grapeshot or Fireball amplified by Storm-Kiln Artist and copy effects
▸Storm-style combo turns via Underworld Breach plus Treasures generating endless triggers

Archetypes

Spellslinger — Eris rewards casting many instants and sorceries with cost reduction and prowess triggers.
Tokens — The second-spell trigger reliably produces an army of 4/4 flying Dragons.
Control — Counterspells and burn double as interaction and as fuel for second-spell Dragon production.
Combo — Spell-copy and recursion engines like Underworld Breach can chain casts into overwhelming token output.