The DARK vs. LIGHT Event will be held on Master Duel on August 17th. For this event, you will join a group of either DARK or LIGHT players (which can be freely changed during the event), each with different restrictions on which cards they can play according to their Attribute, and you will be facing opponents from the other group. The rewards obtained through medals are the same regardless of your group:

From 50 to 11000 Medals: 1900 Gems total
From 12000 to 21000 Medals: 20 Legacy Pack Tickets
At the 5500 Medal threshold, you can obtain a pack of Light and Darkness Dragon protectors/sleeves
At the 22000 Medal threshold, you can obtain a Harnesser of Chaos Title

Additionally, there will be a VSP metric for each group, depending on your wins/draws/losses (but you do not earn any if you surrender). You can earn Titles from missions according to your personal VSP, which haven’t been revealed so farl.

The Forbidden/Limited List for the DARK group is:
Forbidden:
All non-DARK monsters

Archnemeses Protos
Barrier Statue of the Abyss
Brain Golem
Bystial Baldrake
Bystial Druiswurm
Bystial Magnamhut
Bystial Saronir
Darklord Nurse Reficule
Des Koala
Dimension Shifter
Labrynth Cooclock
Stealth Bird
Vanity’s Fiend

El Shaddoll Winda
Garura, Wings of Resonant Life

Cauldron of the Old Man
Chain Strike
Dark Snake Syndrome
Galaxy Wave
Infernity Launcher
Kaiser Colosseum
Misfortune
Secret Village of the Spellcasters

And the Band Played On
Anti-Spell Fragrance
Bad Reaction to Simochi
Backfire
Banquet of Millions
Blasting the Ruins
Chain Burst
D.D. Dynamite
Gozen Match
Light-Imprisoning Mirror
Rivalry of Warlords
Secret Barrel
Secret Blast
Shadow-Imprisoning Mirror
Skill Drain
Spiritual Fire Art -Kurenai
Summon Limit
Tearlaments Sulliek
There Can Be Only One
Vanity’s Emptiness

Limited:
Danger! Mothman!
Lady Labrynth of the Silver Castle
Lucent, netherlord of Dark World

Masquerade the Blazing Dragon

Branded Fusion
Exosister Pax
Frightfur Patchwork
Pot of Extravagance

Big Welcome Labrynth
Solemn Judgment

Semi-Lmited:
Dinomorphia Domain
Dinomorphia Frenzy

The Forbidden/Limited List for the LIGHT group is:
All non-LIGHT monsters

Archlord Kristya
Archnemeses Eschatos
Barrier Statue of the Heavens
Consecrated Light
Dice Jar
Jowgen the Spiritualist
Mahaama the Fairy Dragon
Satellarknight Alsahm
Tualatin
Vanity’s Fiend
Zap Mustung

Cauldron of the Old Man
Chain Strike
Dark Snake Syndrome
Galaxy Wave
Infernity Launcher
Kaiser Colosseum
Misfortune
Secret Village of the Spellcasters

And the Band Played On
Anti-Spell Fragrance
Bad Reaction to Simochi
Backfire
Banquet of Millions
Blasting the Ruins
Chain Burst
D.D. Dynamite
Gozen Match
Light-Imprisoning Mirror
Rivalry of Warlords
Secret Barrel
Secret Blast
Shadow-Imprisoning Mirror
Skill Drain
Spiritual Fire Art -Kurenai
Summon Limit
Tearlaments Sulliek
There Can Be Only One
Vanity’s Emptiness

Limited:

Branded Fusion
Exosister Pax
Frightfur Patchwork
Pot of Extravagance

Big Welcome Labrynth
Solemn Judgment

Semi-Lmited:
Dinomorphia Frenzy