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 Phase.
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.
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.
Restart Can be used only once after starting hands are dealt. Reveal and redraw your starting hand.
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.