The pendulums r cool, but if u put mor than 1 out at the same time they mach up. like if it's ab and a is first and u put another pendulum out when the first 1 is going to make b that turn, then the second pendulum makes b that turn instead of a. is that supposd 2 hapen? ???
Yeah, all the pendulums go in the one stack and they produce whatever the stack is producing. It would be hard to tell what you were getting if some of them were going the opposite direction in the same stack.
They should go to separate stacks then. This makes quanta production way too uneven.
I don't like pendulums all that much though for other reasons as well.
In case of mono, they do the same thing as towers.
In case of duo :
Let's assume you want a deck where you have a primary element which you need more, and a secondary one which you need less of. (Lava Destroyer decks are a great example for this, they need mostly Fire, and some Earth to function)
If you select the primary element as you mark, you are in trouble. Pendulums don't produce that element when played, and they don't produce it on their first turn either : You deck will be slowed down significantly....the card you normally play on turn 1 with towers will arrive into play on turn 3 instead...two whole additional turns is more than enough to make you lose in most damage race situations. (The remaining cards in your hand will be even further delayed...)
If you select your secondary element as the mark then...well, then you are better off with using towers because your mark will provide you with enough of the secondary element anyway.
In both cases, using pendulums wouldn't improve the deck performance, it would reduce it.
In case you need more than two elements, pendulums won't help. They are unable to produce more elements than a tower can : with the inclusion of a tower, you'll get access to the tower's element, while also having access to your mark element anyway, while with a pendulum you will get the pendulum element, and your mark element (which is NOT a new element...your mark already produces it), so in the end, it only changes the distribution, not the actual number of elements you can use.
In case of 5 or more elements, quantum tower is strictly superior to all other options, even though it's very slow and random for quanta production.
Pendulums would be much more useful if they produced quanta of your mark when played, and on their first turn as well, and their own element on the second turn only.
That way they could support decks where you need more of one element and less of another properly.
The best would be if you could select between the two behaviors, though, or a second set of pendulum cards for the second type of behavior.
In all cases though, they shouldn't stack with pendulums in the other phase of quanta production.