Possibly wrong listed chances for Piscea

Platform, device version and operating system:

Windows 11

Screenshot or image:

What you were expecting to happen, and what actually happened:
Skill text of Piscea’s Fish Sign says “2 independent 30% chances to devour”.

I cast it three times in row, on these two stunned Takshakas and devoured none. (Got one on 4th cast).

If I count right, chance to not devour anyone is 0.7x0.7=49%.

So chance to repeat it trice is about 12%. One time per eight cases, at most.

And today I seen it four times already (I am battling in PvPs Geheron with Blue restriction). In fact, in about half of my battles it didn’t work from 2nd or even third cast.

Am I calculating something wrong, Piscea has not 30%, but significantly less, or I am simply so unlucky today?

How often does this happen? When did it begin happening?
Noticed it today.

Steps to make it happen again
Use Piscea in the (any?) battle.

That’s the problem with RNG, you can never be quite sure. The only practical answer is to actually document your attempts (spellcasts vs. devours) and watch how the data piles up over time.

Instances of chance is not the same as X in Y times.

So if you have cast it 8 times, there is no guarantee you will devour in those 8 times. Each time is one single instance of chance. The more you cast it, it does not affect any future instances of chance.

Good time to learn how statistics work.