Equip this card with "Dragunity Aklys" and use it as the cost for this card's effect to destroy 2 cards effectively for free. You can follow this up by Tributing this card for "Icarus Attack", destroying a total of 4 cards for the cost of 2, or to declare an attack with "Mist Valley Falcon" to return this card to your hand to destroy two cards again next turn.
This card can use ANY Dragunity in your Spell/Trap zone for its effect. This means if you normal summon "Dragunity Dux" and use his effect to equip a Dragunity, you can select "Dragunity Aklys" as "Dux's" target. Then use "Dragunity Legionnaire's" effect to send that "Aklys" to the grave.