Your search for "Mysterious Triangle CRMS-EN062" revealed the following:
Mysterious Triangle - CRMS-EN062 - Common - Unlimited from Crimson Crisis Unlimited, available at 401 Games Canada. Rarity: Common Card Text:Destroy 1 monster on the field with an A-Counter. Then, you can Special Summon 1 Level 4 "Alien" monster from...
Mysterious Triangle - CRMS-EN062 - Common - 1st Edition from Crimson Crisis 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:Destroy 1 monster on the field with an A-Counter. Then, you can Special Summon 1 Level 4 "Alien"...