First, Normal Summon "Satellarknight Vega" and Special Summon a Level 4 "tellarknight" monster with its effect.
As you will have two Level 4 "tellarknight" monsters on the field, you can Xyz Summon "Darktellarknight Batlamyus"!
Next, you can Special Summon "Stellarknight Triverr" which is treated as an Xyz Summon by activating the effect of "Darktellarknight Batlamyus."
When you successfully Xyz Summon "Stellarknight Triverr," you can return all other cards on the field to the hand.
If you have 7 "tellarknight" monsters with different name in your Graveyard, you can use the second effect of "Darktellarknight Batlamyus" during your opponent's turn as well.
If you Special Summon "Stellarknight Triverr" at the end of your opponent's turn, you can start your turn while your opponent's field is empty!