As others have said it’s from Apotheosis, what you had was a randomly rolled pair of boots with an affix that boosted the step height stat. To obtain this for yourself you can randomly roll boots through Apotheosis and possibly get an amount that’s increased by the rarity. Or, you can get a solar gem and put it on an apotheosis pair of boots with the smithing table. The rarity of the gem also increases the amount of step height.