Activate an Equipment's equip ability by paying 0, attaching it to any creature you control except Puresteel Paladin or the creature that has One with the Kami attached.
Activate Phyrexian Altar by sacrificing the creature with the Equipment attached, adding one mana of any color.
When the creature dies, One with the Kami triggers, creating a number of 1/1 Spirit creature tokens equal to that creature's power.
Repeat.
By combining the cost-reducing power of Puresteel Paladin with the sacrificial outlet of Phyrexian Altar, you can endlessly loop the equipment you control onto a creature and send it to the grave. Every time that creature is sacrificed, One with the Kami triggers to spawn an army of Spirit tokens based on its power, replacing the fallen creature and fueling the loop with even more mana. Puresteel Paladin ensures this gear costs nothing to re-attach while simultaneously drawing you through your deck, turning a simple sacrifice engine into an overwhelming cascade of resources.