Does Wielder of Water constantly have +2 power while it is alone on the battlefield?

Ruling: Wielder of Water only gets +2 power when it is in a combat showdown attacking or defending alone, not simply when it is alone on the battlefield.

Nuances:

• The card text specifies "while I'm attacking or defending alone" not just "when I'm alone"
• Units are only considered attacking or defending during a combat showdown