On your side of the board, they make for a great potential to draw lots of cards for minimal cost
The Hordemaster is a goblin lord that keeps the action flowing as individual goblins get picked off, which will happen a lot
Milotic has the following abilities: Healing Ripples: Once during your turn, when you play this Pokmon from your hand to evolve 1 of your Pokmon, you may heal 60 damage from 1 of your Water Pokmon
It's also not uncommon to be attempting to win the game outright the turn after you land a Smothering TitheSmothering Tithe or a BurgeoningBurgeoning with some sort of "draw when your opponents draw" trigger
When you can make extra use of the body through equipment or bounce effects the Mulldrifter also goes up in value
Once their leader is defeated, the whole organization has a HeelFace Turn, and everybody forgives them