"Relinquished" + 1 Effect Monster Once per turn, when your opponent activates a monster effect (Quick Effect): You can target 1 Effect Monster your opponent controls or in their GY; equip that target to this card you control. This card gains ATK/DEF equal to that equipped monster's. Monsters with that equipped monster's name cannot attack, also their effects on the field and their activated effects are negated.
Relinquished is the fusion material you need to use to summon Millenium-Eyes Restrict although Relinquished himself can be superior in some ways. First of all Relinquished can equip an opponent’s monster anytime during your main phase.
Another thing when Relinquished would be destroyed by battle, you can destroy his equipped monster instead and the battle damage will also be inflicted to your opponent, an effect Millenium-Eyes Restrict does not have.
Actually, I watched a replay where a Dino player lost because his monster keeps getting Canadia'd.
So this card is very splashable.
Being it only takes a effect monster and relinquished.
You don’t need to run any relinquished
Just fusion substitute cards like beast king of swamp.
Or hex monsters etc