Fabrication Module

Inspiration leads to design.

Panharmonicon will cause Decoction Module to trigger twice when a creature enters the battlefield under your control. This is Panharmonicon’s only direct effect on the loop. The rest of the effects it has on the loop are the result of the extra triggers from Decoction Module.

The resolution of each Decoction Module trigger will cause Fabrication Module to trigger as normal, but since there are twice as many Decoction Module triggers, you’ll end up with twice as many Fabrication Module triggers.

Following from this logic, you’ll also end up with twice as many Animation Module triggers as normal, but there’s no real benefit to this as you still have to pay for each Animation Module trigger as it resolves.

Overall, the best way to take advantage of this is to only pay for one of the Animation Module triggers per cycle and just end up netting two energy and two counters per loop.

How this actually plays out with the stack can be pretty complicated, though, so here’s the simple scenario from the last paragraph step by step. 

(I’ll be showing the stack in brackets at the end of each step with the left being the top of the stack and the right being the bottom. A is an Animation Module trigger, D is a Decoction Module trigger, and F is a Fabrication Module trigger.)

A creature entering the battlefield causes Decoction Module to trigger twice. (DD)

Decoction Module’s trigger resolves, giving you an energy and triggering Fabrication Module’s trigger. You choose a target for the trigger as you put it on the stack. (FD)

Fabrication Module’s trigger resolves, putting a +1/+1 counter on the chosen target and triggering Animation Module. (AD)

When Animation Module’s trigger resolves, don’t pay to make a Servo as we don’t want too many triggers to stack up. You can make a Servo here if you want, but there’s no benefit and it just leads to a more cluttered stack. (D)

Repeat steps 2 and 3. Stacks are (F) and then (A).

When Animation Module’s trigger resolves, pay 1 to make a Servo. Go to step 1.

Yes. Allow me to explain just so that everyone can understand.

Let’s start with a creature entering the battlefield, because that’s the most common place where the cycle will begin:

A creature entered the battlefield under your control, so Decoction Module triggers. When the trigger resolves, you get an energy counter.

You got an energy counter, so Fabricaton Module triggers and you choose a target for the trigger (A creature you control, maybe the creature that triggered step 1?). When the trigger resolves, if the target is still legal, you put a +1/+1 counter on that creature.

A +1/+1 counter was placed on a permanent you control, so Animation Module triggers. When the trigger resolve, you can pay 1. If you do, you create a Servo and go back to step 1.

Step 3 is normally the limiting step, but the chain could also break at step 2 if the target for Fabrication Module’s trigger becomes illegal. (And of course any of the triggers can be countered by something like Stifle.)

Bonus fact: In addition to forming a gameplay loop and having an awesome flavor text loop, the Module cycle also has looping panoramic art, as you can see below.