Murderous Redcap and Putrid Goblin keep coming back for value, Necromancy and Animate Dead cheat bodies back fast, and Goblin Bombardment is the sac outlet that turns loops into damage
What about a set that heavily impacted Modern or Legacy
If the creature with exploit isn't on the battlefield as the exploit ability begins to resolve, you won't get any bonus from the creature with exploit, even if you sacrifice a creature
Giving all your creatures ward is excellent and nearly forces your opponent to board wipe to interact
A deck playing Matoya could certainly benefit from running Esper Origins, but for the most part, I see it in Golgari brews
For example, if you have a bunch of designs that require 5 x copies of each to be included, move them into a folder called "5" or "5 copies"