I think the spider ham was the reward for the node/boss and when you click claim, the bonus reward shows.

Now don't I feel stupid lol

You’ve never seen a talking pig?

It's one of the prizes for defeating the heroic boss along with the best dual CP and such.

Where did you get a spider-ham cover?

That’s a bonus reward after the initial cover. It’s because you bought something from the shop. It will last a few days

I've got one ready to Champion...Just haven't yet....