Diane vs. Helbram is a battle fought between Diane of the Seven Deadly Sins and the Holy Knight, Helbram in Vaizel.
Meliodas was knocked out by Helbram with the help of Hendrickson, Helbram moves closer to the injured Meliodas until Diane appears and protects Meliodas from Helbram, while wielding her Sacred Treasure, the Warhammer: Gideon.
Upon arrival, Diane sees the defeated Meliodas and goes into a deep thought until she grows furious at Helbram for what he has done to Meliodas, and begins swinging her Gideon at Helbram. While this is all occurring, Hendrickson tells Helbram to retreat. After several missed strikes, Diane uses Gideon to crash the area around her to form Mother Catastrophe, to which also forms a giant floating mountain atop of them. Helbram tries to retreat with the help of the flying creature he traveled on, but they are killed along the way by the attack. Helbram, then, wonder if this was the Seven Deadly Sin's true power with their Sacred Treasure as he witnesses Diane's technique:
Mother Catastrophe, winning the battle.
While Diane went back to her friends with the injured Meliodas, Helbram reveals that he was still alive and holds Meliodas'
Broken Sword, which he revealed was the key to unsealing the Demon Clan.
Holy Knight Saga
: Introduction arc
Meliodas vs. Twigo
: Forest of White Dreams arc
Meliodas vs. Gilthunder
: Baste Dungeon arc • Diane vs. Friesia • Ban vs. Jericho • Meliodas vs. Golgius • Meliodas vs. Diane • Meliodas vs. Ruin
Ban vs. Jude
: Capital of the Dead arc • Meliodas vs. Oslo • Ban vs. King (Part 1) • Ban vs. King (Part 2) • Meliodas, Diane & Ban vs. Guila
King vs. Guila
: Vaizel Fight Festival arc • Meliodas vs. Griamore • Gilthunder & Howzer vs. Northern Barbarians • Griamore vs. Matrona • Howzer vs. Taizoo • Cain vs. Old Fart • Meliodafu vs. Baan • Matrona vs. Howzer • Cain vs. Meliodafu • Meliodafu vs. Matrona • Ban vs. Jericho • Meliodas vs. Guila • King vs. Guila & Jericho • King vs. Helbram • Meliodas vs. Helbram
Diane vs. Helbram
: Armor Giant arc • Dawn Roar vs. Armor Giant
Meliodas, Ban, King & Gowther vs. Dale
: Kingdom Infiltration arc • Meliodas, Ban & Gowther vs. Holy Knights of Liones • Arthur Pendragon vs. Hendrickson • Diane vs. Dreyfus, Gilthunder, Howzer, & Helbram • Howzer & Guila vs. Dreyfus, Helbram, Jericho, & Gilthunder • Gowther vs. Slader • Gowther vs. Dreyfus • King vs. Helbram • Meliodas & Arthur Pendragon vs. Hendrickson & Gilthunder • Meliodas vs. Hendrickson, Gilthunder & Vivian • Gilthunder vs. Hendrickson • Holy Knights of Liones vs. New Generation Holy Knight/Demon Hybrids • Meliodas vs. Ban • Dreyfus & Griamore vs. Hendrickson • Meliodas, Diane, Ban, King & Gowther vs. Hendrickson • Holy Knights of Liones vs. Hendrickson
Meliodas vs. Hendrickson
Ten Commandments Saga
: Post-Kingdom Infiltration arc
Meliodas vs. Dogedo
: Albion arc • Diane vs. Gowther • Meliodas, Merlin, Arthur and the Holy knights of Camelot vs. Albion • Ban vs. Gerheade • King vs. Albion
Meliodas, Diane, Merlin, Slader & the Holy Knights of Camelot vs. Galand
: Istar arc • Gilthunder, Howzer & Griamore vs. Red Demon • Hendrickson, Gilthunder, Howzer & Griamore vs. Gray Demon • Gilthunder & Howzer vs. Clay Dragon • Meliodas vs. King
Meliodas vs. Galand
: Ravens arc • Fraudrin vs. Deldry, Arden & Waillo • Jericho vs. Elaine • Ban vs. Galand & Melascula
Escanor vs. Galand & Melascula
: Great Fight Festival arc • Fraudrin vs. Denzel & Deathpierce • Diane, Gilthunder, Howzer & Gilfrost vs. Earth Crawler • Elizabeth & Elaine vs. Torah & Jigumo • Meliodas & Ban vs. Dolzzo & Calzzo • Diane & King vs. Drole Golem & Gloxinia Servant • Gowther & Jericho vs. Escanor & Hawk • Meliodas vs. Drole & Gloxinia
Meliodas vs. Ten Commandments
: Defensive Battle for Liones arc • Escanor vs. Estarossa • Derieri vs. Nerobasta • Meliodas vs. Derieri & Monspeet • Merlin vs. Grayroad • Hendrickson, Zaratras & Dreyfus vs. Fraudrin
Meliodas vs. Fraudrin
: Current arc • Diane & King vs. Drole & Gloxinia • Meliodas, Diane & King vs. Calmadios • Ten Commandments vs. Four Archangels
Elizabeth vs. Derieri & Monspeet