how do trap cards work in yugioh

how do trap cards work in yugioh does eater activate? how does this work? :

Name: how do trap cards work in yugioh does eater activate? how does this work? :
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Description

The effect of Brudiclad's triggered ability lasts indefinitely

Legendaries come in both non-foil and foil cards, so getting any Legendary in foil will up it's rarity

might be best known to the world as a trading card game (TCG), alongside the likes of Pokmon TCG series, but it actually started off as a manga series all the way back in 1996