しかも (moreover)

And what's more, that stuff on the bottom of the memo isn't a stain — it's... b-blood-sealed!?

And to top it off, his very first battle was that dragon slaying!

On top of that, he's weirdly fond of walks — even in the dead of winter he demands his twice-daily walks without fail.

And on top of that, this woman had the nerve to order a kaedama twice.

The budget seems inaccurate, and on top of that, unrealistic.

She can speak French — fluently, at that.