Raphael, the Muscle doubles damage for all creatures, not only countered creatures

[matthewevans]

Discord report

Raphael, the Muscle is doubling damage of all creatures on the battlefield, not just creatures with counters.

Source: https://discord.com/channels/1485498006781427802/1516848314203635824/1516848314203635824
Report ID: discord:1516848314203635824:1516848314203635824:0

Oracle text (verified from client/public/card-data.json)

Double all damage that creatures you control with counters on them would deal.
When Raphael enters, create a Mutagen token.
Partner—Character select (You can have two commanders if both have this ability.)