Clarification: When you use multiple effects that replace “revealing a chaos token” with something, else, you must first declare your intention so you are reacting to what you draw from the bag, because each of these effects are meant to be triggered before you draw tokens from the bag. If you declare you’re going to trigger Olive McBride's ability first, you should then declare which of the 3 tokens you’re about to reveal from Olive’s ability will be turned into 2 tokens from the Grotesque Statue (For example, “I’m going to reveal 3 tokens using Olive, and for the first token, I’m going to reveal 2 instead of 1 using my statue). Then you’ll ignore one of the 2 statue tokens, and be left with 3 total tokens, which you’ll then ignore 1 of. (All of these tokens are considered to be revealed simultaneously, so you are not allowed to reveal the
first 2 tokens with Olive, and then decide whether or not to use the statue).
If you instead trigger the statue’s ability first, you would do the same thing, declaring your intent. (For example, “I’m going to reveal 2 tokens using my statue, but for the second token, I’m going to use Olive’s ability to reveal 3 instead of 1”.) Then you would choose between resolving the first token or the 3 Olive tokens. (Here this may seem a little strange, because Grotesque Statue says “Choose 1 of those tokens to resolve, and ignore the other,” which implies that you only get to resolve 1 token and ignore 1 token, but for the purposes of resolving these types of effects, the 3 tokens revealed from Olive’s ability should be treated as 1 revealed token.) If you decide to resolve the 3 Olive tokens you would then choose 2 to resolve and resolve the other, as usual. - FAQ, v.1.3, May 2018