Forcing your opponents to sacrifice 13 creatures helps get around indestructible creatures, something Blasphemous Act struggles with since its only dealing damage
That being said, if your playgroup is willing, its one of the absolute best group hug commanders thanks to their unique ability
The price difference is possibly due to the card design itself: the purples are particularly beautiful on the card
This ruling on Nissa's Encouragement from Hour of Devastation:You can find any or all of the cards listed with Nissas Encouragement
Nonetheless, I find Hugs to be an incredibly interesting amuse-bouche for Bloomburrow
Shout out to our final common, Tavern Brawler which will let your Commander exile the top card of their library their upkeep and then cast it and the Commander gets power boosts equal to the mana cost as well, so they play well together