When doing Penance, where does the card go and how does the first round work?

Question

Accepted Answer

Another player randomly takes a card from your hand and discards it with no effect. In your first round, you play a card normally and don't discard a second one.

World Without End

When doing Penance, where does the card go and how does the first round work?

World Without End

When doing Penance, where does the card go and how does the first round work?