“Two Seasons: Summer-Autumn 2016” Tournament. Online games for rating (reports, discussions).

It would be possible to completely remove an entire class, just like they did with the Conflux monsters.

That's a shame. Although, if by "class" for the Sylvan faction, they mean only the Rusty and Crystal units, then I think it would be a positive change for the gameplay to remove only 2 regular units while also removing one of the most inconsistent ones.