Mysterious Triangle | Decks and Ruling

This page notes details of Mysterious Triangle (Spell Card/Quick-Play) : decks, tips, effect and rulings. Learn and enjoy playing Yu-Gi-Oh! Duel Links!
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update 11/08/2020

Mysterious Triangle

Mysterious Triangle
TypeSpell Card
Card Effect TypeCard effect / Condition
Supports ArchetypesAlien


Destroy 1 monster on the field with an A-Counter. Then, you can Special Summon 1 Level 4 "Alien" monster from your Deck. Destroy it during the End Phase.

How to get / Rarity

PackAbyss Encounters [SR]
Level-up reward--
Victory against--
Card trader--




  • Destroys any monster that has at least 1 A-Counter on it.
  • Can Special Summoned level 4 or lower “Alien” monster from your Deck to
    your Field.


  • Monsters Special Summoned by this card effect is destroyed at the End
  • Requires the target monster to have at least 1 A-Counter on it.


  • You can also use Mysterious Triangle on your own monsters as long as
    they have A-Counter. One of the plays is attack with your own Alien
    monsters that has A-counter, then destroy it with Mysterious Triangle
    to get another level 4 “Alien” monster out and do another attack.
  • Another powerful play is take control of your opponent’s monster that
    has A-counter(s) on it with Brainwashing Beam, do an attack, and then
    destroy it with Mysterious Triangle to get another level 4 “Alien”
    monster out and do another attack.

Quick-Play Combo

Together with this card, you can use this combo both offensively and defensively since they are both Quick-Play Spells. You can use “A” Cell Recombination Device on the targeted opponent monster, and follow up with Mysterious Triangle to destroy it, Special Summon 1 level 4 “Alien” monster to the field, which may potentially grant you a chance to end the game fast.

Useful Skills

[Skill] descriptionUser
Can be used only once after starting hands are dealt. Reveal and redraw your starting hand.
Mako Tsunami
Mako Tsunami



  • If the monster targeted by Mysterious Triangle was not destroyed due to
    certain conditions, you may not Special Summon any Alien monsters.
  • You can still use this card if you do not have level 4 or lower Alien
    monsters left in your Deck, because the first effect that destroys
    monsters with A-Counter will resolve first, then you can choose whether
    to Special Summon Alien monster.


Monster/Spell/Trap categoriesDestroys your Monster Cards
Summoning categoriesSpecial Summons from your Deck

Other Articles

List of Cards by Card Types

List of Cards by Levels


Comments are appreciated!

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Konami is a 🔥. How tf you gonna tell me that Rare Metamorph can't negate Mysterious Triangle when it targeted my AGK with Rare Metamorph swear to god this game is 🔥ing rigged and Konami can't do 🔥 right.
<< Anonymous
Anonymous Reply
Rare Metalmorph should negate this card, are you sure you don't miss anything else? Has Rare Metalmorph's spell negating effect been used before that?
<< Anonymous
Anonymous Reply
No, it wasn't used for anything else it was the first time I used it in the duel against it. Rare metamorph has been giving the same issues for other cards as well so rip.
<< Anonymous
Anonymous Reply
Had it already negated the effect of a Spell? Rare Metalmorph can only do that once, it doesn't negate everything that targets the monster. (Even though the AI plays as if it does, lol.)
🔥 card
<< Anonymous
Anonymous Reply
Actually trash. You want A counters to stay on monsters. Popping a monster which has an A counter on it goes against the entire strength of the deck and is only useful in a handful of cases.
Gust King Alexander
Hmm Alien Archtype coming to duel links. Nice.

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