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Elder Scrolls Online is free on Epic right now
(beehaw.org)
Been playing this for the last few years. Helped me get through lockdown!
It's been around for long enough that there is absolutely loads of content. I love that there are several different ways to play, too. I love housing and decorating, but there's casual questing, end game content, PVP, crafting... It's fun!
I don't know if we're permitted to post links that that here, so I won't. But if you go to the Epic Games store, it's free through 27 July.
Happy questing!
I can't speak on that specific timeline, but CP has had a pretty large makeover recently. You still only have 4 slottable abilities, but quite a few have moved to passive status. Unsure if the ones you reference specifically are though, green tree is usually a throwaway tree for me.