Cardfight!! Vanguard
Season 4, Episode 21: The Oath of the Blue Flames
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Kamui challenges Gaillard, who is protecting Aichi's seal. Kamui, who turns his friendship with Aichi into his own power, launches a fierce assault on Gaillard, who finds himself fazed. The bonds between mates, or Gaillard's loyalty; who will win?
All Episodes - Season 4
Episode 1
Missing Vanguard
Episode 2
Legion
Episode 3
Aichi's Shadow
Episode 4
Seek the Mate
Episode 5
Naoki's Fist
Episode 6
Blue Flame Gaillard
Episode 7
Steel Neve
Episode 8
The Leader Kai
Episode 9
Meet Great Daikaiser!
Episode 10
Illusionary Rati
Episode 11
Frosty Ice Serra
Episode 12
Ren's Promise
Episode 13
The Place Where Aichi Returns
Episode 14
The Announced Truth
Episode 15
Island Awaiting the Wind
Episode 16
Kai's Will
Episode 17
Gateway to the Sanctuary
Episode 18
Manly Big Bang
Episode 19
Will of Steel
Episode 20
What Doesn't Change
Episode 21
The Oath of the Blue Flames
Episode 22
The Flames of Perdition
Episode 23
Interrupted Sleep
Episode 24
Aichi Awakens
Episode 25
Cold Ambition
Episode 26
Return of Omega
Episode 27
Determination of the Bluish Flames
Episode 28
Our Place
Episode 29
The Obstinacy of the Flames
Episode 30
Sword of Annihilation
Episode 31
Sword of Courage
Episode 32
A Season for Journeys
Episode 33
Vanguards