An OTK involving this card card be made by first Special Summoning "Dark Armed Dragon" to destroy your opponent's cards. Then Summon "Dragunity Darkspear" and tune it with "Dark Armed Dragon" to Synchro Summon a "Trident Dragion" to finish off your opponent.
In a Harpie deck you can discard a "Harpie Queen" to search out a "Harpie's Hunting Ground". Activate the "Harpie's Hunting Ground", then normal summon "Dragunity Darkspear". You can then use "Dragunity Darkspear's" effect to special summon "Harpie Queen" and activate the field spell's effect to destroy an opponent's spell or trap card.