You can Summon any of your opponents monsters into Attack Position, using this monster to attack it (or perhaps another). Try to select the lowest attack monster in their Graveyard for a nice amount of battle damage.
If the Fusion Materials are banished, Fusion Summon this monster with "Parallel World Fusion". It won't make you Special Summon an opponent's monster since you can't Special Summon anymore monsters that turn.
This is helpful on the second turn of the Duel. Destroy your opponent's face-down monster and Special Summon it in face-up Attack Position, then Summon a high Level "Elemental HERO". Destroy the monster with one attack and use your other monster to attack directly.
Oddly enough, this card can be used as a Tribute for the effect of "Armoroid".