Given the sheer density of commons and uncommons, you've likely gotten several through natural accumulation over time, and that's to say nothing of how many come in the packs themselves
Sometimes the bonus is a big deal, like Ignoble Hierarch or the Seedborn Muse
Decks that thrive on token generation or have a high number of permanents, such as Selesnya (green-white) token strategies or any deck leveraging the Demon of Catastrophes or Teysa, Envoy of Ghosts, would find this card advantageous
Use instant-speed card draw to cast instant enchantments and enchantment creatures in response to your opponents' spells and attacks
We made a rare cycle (and an extra blue card) for all the main creature types and three Shapeshifters with changeling for uncommon as they played better in Limited
Ive now included four versions of Ob Nixilis yes, its a bit much, but each fills a unique role