After banishing powerful monsters with this card's effect, Xyz summon with it. Since cards don't leave the field when used for an Xyz summon or detached, your opponent's monsters will remain banished.
This is an ideal target for the effect of "Blade Armor Ninja", as it is a "Ninja" monster. With 2800 ATK, this monster combined with the double-attacking effect of "Blade Armor" could cause some serious damage, or at least level your opponent's field.
Since the banished monsters are Special Summoned instead of being just "returned" to the field, this card's effect is ideal to get rid of Nomi or Non-Special Summon monsters (like most Infernoids), because they cannot be summoned by this card's effect or monsters that gain effects after being summoned in a particular way (like the Gladiator Beasts).
You can use this card's effect on itself after an attack to dispose of unneeded "Ninjistu Art" cards that are in the field and trigger its final effect to summon itself from the Banished Zone and gain the ability to attack and use it's effect again. If done right, you can perform a loop that clears your field of clutter and allows multiple attacks.