Neverfall Onslaught

About
The Neverfall Onslaught is a Monthly Event that takes place on certain Fridays between 9pm-9:40pm. In this event, the participating players will be sent to an instanced version of Neverfall's capital to protect its Neverfall Core crystal from hordes of invading Changelings, not unlike a Territory War. Slaying enemies and bosses will award you merit that can be exchanged for rewards at the end depending on the score threshold you've reached by its conclusion.

Starting the Event
The event's beginning is heralded in World Chat as a system message instructing players to meet with Defense Commander Kesper in North Archosaur (near the teleporter). Players must be Level 80 and Aware of Vacuity to participate. Kesper will teleport players into the instanced Neverfall City. Players can then move to the south gate of the city and await the beginning of the changeling onslaught. It is recommended that you party with others to gain Merit from the kills of your other members.

The Onslaught Begins!
Once the event is underway, there will be a notice on screen about the first wave of Changelings emerging from nearby portals. Small swathes of different changeling mobs will emerge and begin wandering around the outer walls of the city with some attempting to enter it. The Neverfall Guard NPCs around the gate will hold and distract some of these monsters, allowing you time to pick off scattered foes. Among them will also be creatures from the Future of Mankind Initiative (FMI) who will wander about as mini-bosses that you can kill for a slight boost in Merit. They may also drop tokens that will allow you access to several ballista vehicles near the gate. The changelings all have "Toughen" effects, which will cap the damage you can deal to them on a single strike. After the first few initial waves, a notification will appear, notifying you that the Changeling airforce has been deployed. That will be your party's cue to take to the skies to take out some airship mobs attempting to fly overhead. These Airforce spawns will not always be among the usual waves, but will appear on occasion.

As the waves progress, more varied mixtures of changelings will appear through the event, including a few Bosses.

The Commanders Appear
At certain stages of the waves, certain boss monsters will appear both outside of the South Gate and inside of the city:

A Punch
A giant hand-like boss that will repeatedly pound the ground as it marches towards the city from the gates. It will deal frequent AoE damage, as well as debuffing your attack rate and channeling. A Punch will also spawn Kamikaze Terracottas to aid it.

Four Changeling Lords
Not unlike the Four Wraith Kings in Heavenfall Temple, there are four changeling lords to contend with too: Death Lord, Ocean Lord, Emerald Lord and Blood Lord. Each one is especially weak (or resistant) to a certain element, and they will debuff you with a special effect called "Drunken". Though their HP is high, this debuff will gradually increase your outgoing damage by 5% per stack. However, at 10 stacks, you will take extreme damage, often enough to kill you. The effect wears off over time, so if your stacks are getting high, the best thing to do is peel away from the fight till they decrease enough to not be threatened by the drawback of this debuff.

Hellhound Cerberus
This boss spawns within the city. The Hellhound will deal moderate occasional AoE damage, as well as spawn a group of Infernal Thralls to aid it. The boss also has a frontal rectangular AoE that deals heavy damage to anything caught in it after a few seconds so try not to stand directly in its line of sight.

Black Dragon Lord Nidhogg
Like Cerberus, this boss spawns within the city in the air near the Neverfall Core. The boss deals moderate AoE damage on occasion and will spawn Abyssal Ironclad Falcons to support it

The Mastermind Himself
After the final wave of Changelings has spawned, Siege Commander Destal will arrive further south of the Neverfall Southern outskirts from the area you've fought in. Little is known about his overall abilities, but he does spawn portals that summon Mecha Guardians to aid him, as well as takess your Chi in exchange for a Death Contract item to deal heavy damage to him and his allies.

Rewards
Not unlike other events, you can gain a certain amount of Perfect Silver Notes and Perfect Gold Notes depending on the score threshold you've reached with your accumulated Merit: