Finally the focus with the water splint allowed me to get five more chests for the collection. So far this season I have already managed to collect 4 chests per day and I already have 20 chests for the season.
The rewards this time were four cards, two of them being rare. Not a bad reward. Today was a fire deck so I'm going to rest and recover energy for the next few days. That is to say, tomorrow Monday I won't be collecting chests.