Fortress Whale's Oath (TSC)

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Fortress Whale's Oath
Yōsai Kujira no Chikai
Card type Ritual
Number 700
Deck Cost 0

A ritual for summoning a Fortress Whale with tributes.
For this, two monsters and a Mech Bass are needed.

Password 77454922
Low-level ante Yes

Obtained by

"Fortress Whale's Oath" can be purchased in the shop.

  • When the player wins a Duel, up to 50 cards are added to the shop. Each has an intended probability of 27/30,000 being this card. But due to a bias in the random number generation, it is actually a probability of 54/65,536.
  • When the player enters this card's password (77454922), it appears in the shop.

"Fortress Whale's Oath" can be obtained via ante from the following pools. The chance of winning it is listed as a percentage and a probability out of 2048.

Pool % 2048th
Low-level antes 1.76 36

Opponents' Decks

The following characters use "Fortress Whale's Oath" in their Deck.

Character Qty
Mako Tsunami 1


"Fortress Whale's Oath" can be used to Ritual Summon #718: "Fortress Whale", by sacrificing #441: "Mech Bass" and two other monsters.


In other media