At a short glance:
-Weapons can now get step 7 (rip fire wand ego and current step 6 weapons). You have to craft these stones, so no using event protection stones?? oh boy. Assuming step 7 follows the same trend as other steps, it should be +74% crit dmg for 2h and +50% crit dmg for 1h.
-Celtic Shuriken/Dowra/Cylinder/Knuckle/Bars (rip all current versions of these weapons). The cylinder is called Celtic Tetra Cylinder so you can probably expect something that enhances all 4 elements at the same time.
-New set effect gear with +3 Lv of pierce (lol conqueror 67 demonic/divine lance and bashing with lv 8 pierce bhafel slayer) patterns drop rarely from dead end chests in dungeon. Since it's a set effect and not an enchant like 67th, this probably does mean Lv 3 piercing Final Hit even though swords have no innate pierce but we'll see.
-New firewood that increases success rates.
And plenty more that Rixx or the nation KR team will hopefully translate/find out as more information rolls out. Thanks to Skyjie for translating. In the meantime, the following nexon forum thread has more information: