Once

This can be used as a segue to almost any existing gambit, or for Role play by analogy with gambits like 5 facts, or Truth or Dare, and just like that, during the process, you can draw out interesting information.

Tell me something that happened to you only once in your life. Let's take turns.

It can also be used to shift the frame:

She:

My friend has a dog named Dusya, and while I was washing socks for my nephew, the neighbor was drilling into the wall and the sound was so horrible that the blue dress...

You:

Yeah, I had something like that happen to me once too.

On her questioning look

I thought it was one of those silly stories that only happen once in a lifetime.

After that, you can move on to any gambit from the phase.