First, Summon "Dragunity Aklys" to activate its effect and Special Summon "Dragunity Militum" from your hand.

Since this will equip "Dragunity Militum" to "Dragunity Aklys," you can Special Summon a monster with the effect of "Dragunity Militum." Then, use these two monsters to Synchro Summon "Dragunity Knight - Vajrayana" and equip "Dragunity Aklys" in the Graveyard with its effect. By using the effect of "Dragunity Knight - Vajrayana," you can double its ATK as well as destroy 1 card on the field with the effect of "Dragunity Aklys."