You can easily Special Summon this card by sending it from your hand to the Graveyard for the effect of "Number 10: Illumiknight", setting you up for the Xyz Summon of a Rank 3 Xyz Monster.
Add all three copies of "Light Serpent" with "Photon Veil"
Then you can use "Beckoning Light" to send this card to the Graveyard while also recovering monsters from your Graveyard. This would be even better if you have other copies in your hand. Discarding cards sends them to the Graveyard, though "sending" is not discarding.
Or, instead of using "Beckoning Light", you can send all 3 "Light Serpent" to Special Summon "Montage Dragon", giving it 2700 ATK. Then, Xyz Summon an Xyz Monster.