Special Summon this monster with "Call of the Haunted" on your opponent's End Phase. Then flip this card face-down, flip it back face-up, and search for a Level 4 "Geargia" monster for an Xyz Summon. "Geargiaccelerator" is recommended to avoid using up your Normal Summon.
You can search for "Geargiaccelerator" and use that for the Synchro Summon instead of "Geargiarmor". If you have a second "Geargiaccelerator" in your hand, you can Summon another "Karakuri" Tuner, Summon the second "Geargiaccelerator" and make another "Karakuri Shogun mdl 00 "Burei"" or a "Karakuri Steel Shogun mdl 00X "Bureido"" and Summon a third "Karakuri" Tuner. At this point, you still have the original "Geargiarmor" on the field, which you can use for a third Synchro Summon. If the third Synchro is a "Scrap Dragon", you can use it and your two "Karakuris" Synchro Monsters for an OTK.