Do players get priority at the end of their opponent's turn to cast reaction spells?

Ruling: No, you do not get priority at the end of your opponent's turn to cast reaction spells. You can only get focus on an opponent's turn if they start a showdown or specifically play a spell card.

Nuances:

• This is different from games like Magic: The Gathering or Yu-Gi-Oh
• The design choice prevents having to pass priority around 4 players constantly
• Reaction spells' "anytime" reminder text can be misleading if you don't understand how focus works