Friendly Reminder

If you've not done it yet, completing all 7 of the Arenas once with EACH weapon for each one, awards the Feather of Mastery, which grants Carving Master(NOT Carving Pro), a skill that adds a completely guaranteed extra carve.

I need to emphasize that your score on the arenas does not matter, at all; I had a B Rank on most of them when I finished the last weapon and still got the Feather. So, you can play them as carefully as you like - and for those wary of Arenas after GU or 4U, be assured that the arenas now scale down to solo health values, so they're not auto-scaled to 2 players even if you're solo, in Rise; this makes them considerably easier.

Putting it out there because the game does not really indicate this in any way, and Carving Master can only be obtained this way(and is pretty handy for those still chasing Medullas, Gems, Claws, etc.).

Another thing I'm not sure of is whether or not you'll need to complete any arenas added in 3.0 to get it after 3.0 dropped, so I figured I'd just remind everyone in case anyone else was overly cautious like me.