Acerak · 7:40am Mar 13th, 2017
People don't really get him. They think he's a joke, or he's twiddling his thumbs while letting the girls heal up and recover.
Well, first off, we are seeing this through Sunset's eyes and how she - and lately Twilight - are seeing things.
Acerak doesn't know they are recharged magically, and physically he couldnt care. To him, they're chattel, an eventual food source. He's been manipulating Sunset for years by playing on her doubts and fears and was sidetracked when She started seeing Twilight. So he did the next best thing: disrupt the portal and cut them off from obviously more powerful allies and frustrate them mentally.
The Harpies as I wrote them feed on agony and mental pain. What could be better than making you destroy your friends, even though you know in you head they are only illusions?
Long game plans. These short tauntings will only put a few more cracks in the levy. Dash is worried about Aj, Rarity worries about Fluttershy, and now Twilight is gone and Sunset may not be thinking perfectly clear. Honestly, Pinkie is probably the most mentally stable of the group right now outside of the Sirens.
Also, he's trying to break down an ancient extra planar prison that he only slipped out of because a doddering old wizard put them in there for the time being - his words not mine. That's going to take time. It's not like has a pair of sacrificial hobbits that can carry it to a volcano....
He's not aware of the Elements, he doesn't know about the Tree, and he doesn't particularly care if they try to stop him because they've done such a bang up just so far, right?
Chaos Theory, as a mathematical science, is roughly broken down into the Butterfly Effect. Edward Lorenz summed it up best by saying "Chaos: while the present determines the future the approximate present does not approximately predict the future."
Because honestly, who predicted there being a Sapling of Harmony? And how exactly did Star Swirl die?
Hmmm.....
Also, why try to drive Sunset insane?
What can seal can also throw wide open. A key both locks and unlocks.