What cards can banish all of the monster in graveyard or something like that?

I run a Cyber Dragon deck. Cyber Eltanin x3 are included of course. So to make them be Special Summoned with the strong Atk, they need to be banished. So can anybody tell me what cards can do it or the close effect like that?

Eltanin banishes them by himself when you use his effect to special summon himself.

Also, banishing monsters with an effect other then eltanin's in a cyber deck is pointless, because eltanin gains attack equal to the number of monsters that HIS effect banished, not the total number of monsters banished

System Down is what you're looking for.

Thanks to Zoex and Danica for the responses. Now I know what to do with my deck.

Zeox*