Given how strong all of those abilities are, its only natural that thisll see a lot of play, even outside of purely colourless decks
It supplies a ton of reach at a flexible casting cost
Making Auras cost three less is quite the discount, and helps enable Enchantress decks to storm off by cantripping off of their Auras when they have Enchantress creatures in play
If you sacrifice a creature, (say it's an artifact creature, so use Osgir's ability), it will die, then be exiled (due to Hofri's trigger), this will create a 3/2 Spirit creature token (due to Quintorius' trigger) and a copy of the original creature that is also a Spirit
It's good to be aware of these archetypes because they sometimes come up in Limited, like the Lost in the Woods "combo" in Dark Ascension Limited, or making your own surprising imitation of a Fog deck by just drafting a pile of removal and no good win conditions