Patch 26.04's star attraction is the new Reaper class, which only becomes available once a player hits level 40 with at least one character (And yes, there's an achievement to be the very first Reaper on any given server. Make us proud, Massively readers!). The Reaper is a leather-wearing, Elin-exclusive class that does mid-range damage with a scythe. It utilizes chains and combos extensively to do its DPS work.
The patch also contains the new Reaper starting area of Ashen Hope, a big revamp to the crafting system, a production system, and an update to glyphs and the skills UI. It's a two gig patch, so you'll want to familiarize yourself with all of the ins and outs of the patch notes before you log in.