Forum:Fiendish chain question

I have a question about fiendish chain. For example, if my opponent uses Onslaught of the Fire Kings to summon Garunix from his deck and I activate a Fiendish Chain to prevent it from attacking and negate it's effects, he ends his turn and Garunix is destroyed by the Onslaught at the End Phase, does his effect activate at my opponent's Standby Phase or not? Because since he was destroyed by a Magic Card effect, he should comeback, but while he was on he field, he had his effects negated. Does his effect activate while he is in the Graveyard even though his effects were negated on the field? I'm kinda new to Yugioh, sorry to bother with what is possibly a dumb question to more experienced players, some card effects and how they respond to each other or when/where they activate is still really confusing to me.