I noticed at first that you can get 2 legendary cells for 3 gems.

So I did some math and realized, I would only need to spend 150 gems to get 100 cells and then craft monster right?

But when I bought 20 of them, price increased to 4 gems, so I stopped spending my gems on this.

Does price increase every 20 cells?

So first 20 will cost you 3 gems each (well 2 cells now during this event)

from 20 to 40 it will cost 4 gems

from 40 to 60, 5gems

from 60 to 80, 6 gems

and from 80 to 100 = 7 gems.

If it goes like that, then I would need to spend 250 gems on it ... so it's like those offers for 249 gems?

Just wanna make sure if the price increase goes like that, or if it gets any lower/higher than my predictions.