It's where you land after you've built all the Constructed decks you want to or when your life has changed to be less accommodating to playing a ton of Magic , like when you get a full-time job, have children, etc
As Specialists lets you choose a creature type, it is just efficient in general and fits decks that focus on Zombies, Demons, Humans, Angels, Clerics, and many others
However, theyre by no means necessary, so you should pretty much always take good, playable cards over them
However, if you dont intend on buying a sea of Emerging Powers boosters (I dont blame you if you dont), its much more economic to obtain the codes on their own
To heal damage from a permanent, remove all damage currently marked on it