Have this card out with an Xyz Monster at full Material. Use this card's effect to revive a second "Blue-Blooded Oni", then use that one to revive a third "Blue-Blooded Oni". Combine the first and second "Oni" into another Xyz Monster. Using the third "Oni", detach and Special Summon the first "Oni", then use it to Special Summon the second "Oni", and so on. "Zombie Master" and "Mezuki" quicken the process.
Have an Xyz Monster with two materials, a copy of this card and "Cannon Soldier" on your field. Activate this card's effect to detach one and revive another copy of this card. use the new copy to detach again and retrieve a third. With this, you have three copies of this card and the "Cannon Soldier" and the Xyz. Tribute the Xyz for the 500 burn and then use the spent copies of this card for another Rank 4 monster. You could make up to 15 Xyzs this way and follow by using the copies of this card and the "Cannon Soldier" for a total of 9500 damage.
You can revive "Bone Crusher" and destroy a Spell or Trap, then Xyz Summon so you don't lose "Bone Crusher".
"Gem-Knight Pearl" is the premium candidate for this card's cost, as removing Xyz Materials from him has no drawbacks whatsoever.
Summon another "Blue-Blooded Oni" with the first, then Summon a "Zombie Master", and use its effect to Special Summon "Bone Crusher", destroying a Spell or Trap. Now Xyz Summon two more "Gem-Knight Pearls", for a total of 3 of them. If you have "Mezuki" in your Graveyard, and any of the Stacked monsters are detached, you can use "Mezuki" to start the chain over again, and Summon another two Rank 4 Xyz Monsters.
If you already have one Zombie-Type monster in your Graveyard, after Summoning a Rank 2 Xyz Monster with "Plaguespreader Zombie" and "Quillbolt Hedgehog", detach "Plaguespreader" and revive it with this card, then Synchro for 6.