Banish this card with the effect of "Shiranui Spectralsword" to Special Summon a Level 6 Zombie-Type Synchro Monster, then use this card's second effect to Special Summon "Spectralsword" and Synchro Summon a Level 8 monster.
Use this card's first effect to Special Summon "Uni-Zombie", use that monster's effect on itself to send "Mezuki" to your Graveyard (preferably from the Deck) and increase its own Level by 1, then use the effect of "Mezuki" to Special Summon this card and subsequently Summon a Level 8 Synchro Monster or a Rank 4 Xyz Monster.
This combo can be supplemented if there is already one or both of the following in your Graveyard: "Mezuki" or "Shiranui Smith"/"Goblin Zombie". In this case, use the effect of "Uni-Zombie" to send the missing monster (if any) to your Graveyard, preferably from the Deck. Then, use the effect of "Mezuki" to Special Summon "Goblin Zombie" or "Smith", and perform a Synchro Summon using that monster and "Uni-Zombie", whereupon the effect of the non-Tuner monster can be activated.
This combo can be further supported if this card was Special Summoned by the effect of "Shiranui Spiritmaster"; in this case, the second effect of the Special Summoned "Uni-Zombie" can be used to send any Zombie-Type monster from your Deck to the Graveyard for future use, since "Spiritmaster" can be used as the other Material for the resulting Synchro or Xyz Summon.
If there is a already banished "Shiranui" monster, Tribute this card to activate its effect; since it will be banished by the effect of "Spiritmaster", its other effect can subsequently be used to Special Summon the aforementioned "Shiranui" monster.
If there is a already "Mezuki" and/or "Smith" in your hand or Graveyard, Tribute "Spiritmaster" instead for this card's effect to Special Summon "Uni-Zombie", then use the effect(s) of "Uni-Zombie" to ensure those monsters end up in the Graveyard (if both of its effects end up being used, one of its effects can be used on an opponent's monster or "Solitaire", to avoid having a Level 5 monster interfere with your resulting Synchro or Xyz Summon). Use the effect of "Mezuki" to Special Summon "Smith", Synchro Summon any monster using "Uni-Zombie" and "Smith", then use the effect of "Smith" to search for "Shiranui Style Swallow's Slash". In this case, this card will serve as the Tribute for that Trap Card, and because this card will be banished by the effect of "Spiritmaster", this card's second effect can be used to Special Summon the monster that was banish by the effect of "Shiranui Style Swallow's Slash".
"PSY-Framelord Omega" is an ideal monster to Summon this way. By doing so, your banished monsters can continually be re-used by that card's effect, as well as use its other effect to protect itself in the meantime.