Here, THINK about it.
First, you'll need Animate weapon. Okay, not bad.
Before that. you need 2 air.
Then you'll need 9
.
Then, for the next fractal, you'll need 9 more aether quanta, since all
is drained.
Even then, the animated weapon can die from CC. If that happens, go back to the beginning.
As soon as you fractal, you'll need 2^8
to pay for all the knives. Not too bad, can be saved up.
Now you have 8^4 + 4 damage per turn. 36 damage. Okay.
Let's say the opponent has a shield, or unluckily a haxx one, then your damage is negated by a bit. We'll use permafrost shield as an example. Okay, so thats now 3^8, + 4. 28 damage.
Also, lets not forget the one of the field. It
can be killed, at ANY time, by CC.
So yeah, this is definably powerful, and Fractal puts nearly every card into overpoweredness. Remember what Higurashi or Vrt(?) said about balance: "Balanced cards should be all around and even. Negative feedback should not be "OP! THIS PLUS FRACTAL = OTK!"" or something along those lines.
As for Xeno, raising the cost by 1 for both would do the trick. Compare it to frogs.