It is January of the year 2028. Tower has just added its 200th floor. The only characters strong enough to make it past Floor 190 are Ragnarok, Post-Renewal Phantasma, and the current TW leaderboard champ Brunhilde.
You load up your Level 93 Ragnarok, and equip her with her new package weapon that shatters Frozen enemies on contact, sending shards into the air that strike new waves of enemies as they spawn in, freezing them in turn and looping the process again.
Mission start. Floor 200. All skills do 50% less damage, and all enemies do 50% Penetration against characters of the same racial type. One wrong move is enough for a mob enemy to one shot the player.
The first wave spawns. Demon ninjas, robo spiders, demon bears... Ragnarok wipes them out easily.
Now the second wave. Oboro and Ingrid, along with another huge multiracial mob, spawn. They too fall to Ragnarok.
The third wave. This time, the Masked Taimanin, LWS Squad, and Queen Arachnea, and yet another huge mob. Intense, but Ragnarok defeats them.
The fourth wave appears. Archon Edwin Black, and Asagi, Sakura, and Shiranui, all in their Demon form, spawn in, alongside a massive army. Challenging as it is, Ragnarok wipes them all out.
Surely that's it, you think to yourself. That has to be it... right? Your breath hitches in anticipation of that familiar victory fanfare.
Instead, you hear the warning siren yet again. What now? You ask yourself.
An unfamiliar cutscene plays. The screen fills with a bright white mist. The clicking of heels sound as a silhouette begins to form. Who could it be?
Oh my god, you realize. Oh no.
Oh no no no.
The final boss, is...
Ragnarok.
You try to Snow Storm your doppelganger, but it's futile. She dodges, creating a massive Icicle Zone that freezes your Ragnarok. You watch helplessly as a Frosty Gale tears through you, befalling your Ragnarok in one shot.
From that day, until EOS's a mere year later, the Arena Tower stands - it's final floor unshaken and undefeated.