It was first teased in the Phyrexia: All Will be One card Atraxa, Grand Unifier, and since then players have theorized potential mechanics and effects, including a few prototype concepts that involve creating a completely different battlefield
When the Deck is centred around combo plays to bring out your high level Synchro monsters, this effect could save you the Duel
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They also have offensive effects that either boosts their ATK or grants additional attacks (e.g., "Frightfur Bear", "Frightfur Sabre-Tooth", "Frightfur Wolf", and "Frightfur Tiger"), destroys cards on the opponent's field ("Frightfur Tiger" and "Frightfur Leo"), prevents the opponent from activating cards or effects when they attack ("Frightfur Chimera" and "Frightfur Sheep"), or steals an opponent's monster by equipping them to themselves or Special Summons them to their controller's field ("Frightfur Bear" and "Frightfur Chimera")
But it can be a great way of getting more monsters on the field
Several factors influence Fates Collide card values: card condition (mint cards worth 3-5x more), rarity (holographic and rare cards command higher prices), first edition status, PSA/BGS grading scores, and market demand for specific Pokemon