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 18/01/2017

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!

Please drop your ideas and suggestions below. We keep updating the page based on your posts!


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 rigged and Konami can't do shit 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.)
Cancer 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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Comments (updated every hour)

There will need to be a special skill to make this card even remotely usable.
dunno why they hate so hard on GX when there are plenty of wonderful characters there !
I wish they would allow us to briefly see our opponents deck prior to a pvp duel( vice versa) fli...
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