Pendulum Effect
You can target 1 other Spell/Trap Card on the field; destroy both this card and that target. You can only use this effect of 'Eccentric Archfiend' once per turn.
Monster Effect
You can Tribute this card, then target 1 monster on the field; destroy it. You can only use this effect of 'Eccentric Archfiend' once per turn.
Atom 1.0
