It appears that some rare cells are only available for 1 diamonds. Mudflow cells used to be availalbe for silver, but recently I saw only offers for diamonds, while only breedable rare monsters were offered for gold I think.

@Community-Managers, is this intentional? This would once again be a slap in the face of newer players, since "older" players will have bought all these cells for gold, so it would be unfair to change the price to diamonds.

@Frunobulax the special rare's like Mudflow are only in cellshop for gold during cellweek they are for gems during normal sales

What she said.

@Marianne-van-Es
Ah, thanks. Wasn't looking for Mudflow at the time, so it's quite possible that I saw his cells in cell week.