How to Find (& Beat) the Secret Boss

Deltarune Chapter 1 has a secret boss for players to challenge. This guide will show players how to find and defeat this ultimate Deltarune challenge.

Chapter 1 of Deltarune features a secret boss that players might have missed on their first playthrough. With the release of Chapter 2, players are eager to jump back into this magical world with Kris, Susie, and Ralsei. While Toby Fox, the developer behind both Undertale and Deltarune works on releasing more chapters, it's possible that players might not have discovered every secret within the chapters that already exist. In this case, players can take on Jevil, the most difficult boss battle in the game.

In order to battle Jevil, players will first need to find their location. Jevil can be found hiding within the Castle, the final location of Chapter 1, and players will need all 3 keys in order to unlock the door to him. After clearing out the Castle Dungeon, walk past the shop and take the elevator to the first floor. Head down and to the right to find another elevator with the floor '????" and head downstairs. After getting off the elevator, follow the path to find Jevil.

Speak with Jevil and he will mention that players need to find a key to unlock the door. The key itself can be found by speaking with Seam, the Shopkeeper. Players can find him at the Field within the shop. Speak with him, and choose the 'Strange Prisoner' dialogue option. This will give players the Broken Key item. Now players just need to fix it to open the door.

How to Unlock The Secret Boss in Deltarune Chapter 1

After grabbing the Broken Key in Deltarune, the game will provide hints on where to find the rest of its pieces. To find the first piece, fast travel over to the Bake Sale and move left. Walk past the area where the two Bloxers are, and keep moving to find a room with the black and white dancers that block the path ahead. Take the path to the south and continue until it seems that Kris is walking off the path and on air. Keep moving forward and follow that secret path to find a new section with Rabbicks to battle, or run from. Follow this path to find the second piece to the key.

The third and final piece can be found in the Field. Fast travel to this location and head to the right and up, until reaching the puzzle from earlier in the game. This time around, players need to set the combination to Diamond, Heart, Clover, and Spade. This will unlock the final piece of the key. Now, players just need to fix the key to make it usable.

In order to do this, players will need to go back to the Bake Sale. Take the path to the north to find Smith Malius. They will notice the broken key pieces in the player's inventory and offer to fix them up. With the fixed key, players are now ready to take on Devil. Go to the shop to buy healing items and prepare for the battle. Head back to the elevator with the question marks and approach the gate to start the battle with Deltarune's secret boss.

How to Defeat The Secret Boss in Deltarune Chapter 1

Players have the option to go passive or violent for this Deltarune battle. Going peacefully will reward players with Jevilstail Armor while going violently will give the player Devilsknife. The choice is up to the player, since Undertale and Deltarune are titles that reward players with the option of choice when it comes to dealing with battles. Since this is the most difficult battle in the game, players will just need to practice reading his moveset and get comfortable with dodging his attacks. Fortunately, most of his attacks have text cues, making it easier to determine which move he is going to do. This is how players can deal with them all.”Catch me if you can” Jevil will teleport, appearing at various sides of the screen and tossing out spades. They are pretty fast, so players just need to get comfortable with their timing to dodge them.

• ”Having fun yet, join the club”: Clubs will appear from both the left and right sides of the screen. They fly by fairly quickly so be careful when they appear.
• ”Let’s make the Devil’sknife”: The Devilsknife will appear in a square. Players can dodge this by heading into the middle and moving back and forth between the edge of the screen and the center.
• ”Let’s ride the carousel game”: Horses will ride diagonally across the screen. Just avoid the corners for this move.
• ”My hearts go out to all the sinners”: 4 hearts will sweep across the screen, spinning towards you. Two pairs of hearts will attack the players separately. Just wait and move once they approach.
• ”Shall we play around?”: Jevil will fire spades that spiral towards you. This is a big attack so make sure to dodge far away from it to avoid getting hit.

Once players get through all of these moves, Jevil will begin to go into his desperation mode. During this time, all the attacks from above will be used at the same time with different speeds. The combat box will also be removed as knives begin to rain from the top of the screen. This is the sign that the battle will soon come to a close. This also allows players to move around outside of the play area, making it easier to dodge the knives. After Jevil has been defeated (or gives up depending on how players handled this battle), they will be rewarded with either the knife or the piece of armor.

Players do not need to clear out the rest of the chapter in order to attempt this fight. It becomes available at any point after making it to the Castle. With the release of Chapter 2, players can also jump back into Chapter 1 to take on Jevil if they missed it during their initial playthrough. It might be years before the release of Deltarune Chapter 3 so players can extend their playtime by taking them on. The rewards for completing this challenge might be small but they can be carried over into Chapter 2. It's likely all items can be carried over into future chapters so keep those save files safe until the wait is over.

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Deltarune is available now on Nintendo Switch, PlayStation 4, and PC.