User:Boblers/Hell's Park Underside

Hell's Park Underside is a mode where you fight bosses that have customizable difficulty levels.

Overview

Hell's Park Underside re-uses the area names of the original Hell's Park, but it has only 1 boss fight (consisting of 4 enemies) per area. Each boss can have their difficulty level customized, starting at level 1 and going up to an unknown maximum.

Clearing a stage for the first time grants gold and silver Friendship Badges, which can be exchanged for rewards. These first-clear rewards are reset every month.

Difficulty levels

Before challenging a stage, its difficulty level can be selected. Higher difficulties will increase enemy levels, add skills to the enemy, and add team-building restrictions.

When a stage is cleared, the player receives the reward for that level, as well as the rewards for all levels below it. These rewards reset monthly.

Initially, only 10 difficulty levels are available for each stage. Clearing level 10 on a stage unlocks levels 11-20 for that stage, clearing level 20 unlocks levels 21-30, and so on.

• The maximum possible level isn't currently known, but someone has reached level 240. It's probably safe to assume that the levels are effectively infinite.

Level	Gold	Silver
1	??	??
2	??	??
3	??	??
4	??	??
5	??	??
6	??	??
7	??	??
8	??	??
9	5	300
10	5	300

After the first 10 levels, each level no longer gives gold badges. Instead, each level gives a standardized amount of silver badges, depending on the level range.

Level	Silver per level
11-20	100
21-30	30
31-40
41-50

Rules

All battles in Hell's Park Underside have a general set of restrictions in place:

• Allies cannot pierce attributes.
• Attribute affinity down does not work.
• Anti-pierce effects do not work.
• Effects that increase your Press Turns or decrease the enemy's Press Turns do not work.
• Effects that prevent spending a Press Turn (such as Chief God's Rage) do not work.
• Remnants and Critical Hits will not use half a Press Turn (however, if an attack with those qualities also hits a weakness, then you do use half a Press Turn).
• Damage reduction and reverse damage reduction will not work.
• Dx2 Skills (from Liberators) will not work.

Additionally, each area will impose their own restrictions on the demons you can bring, depending on the difficulty level selected.

Rewards

Friendship Badge shop

Gold badges

Exchange Lineup	Gold badge cost	Cap
Lost Name	600	1
Lost Name Spirit × 10 (1st set)	100	10
Lost Name Spirit × 10 (2nd set)	150	20
Lost Name Spirit × 10 (3rd set)	200	30
Transcend Stone for Lost Name × 1 (1st set)	100	94
Transcend Stone for Lost Name × 1 (2nd set)	200	88

Notes:

• Initially only Lost Name is available, but after buying him, the spirit and transcend options are unlocked.
• Each set of spirits is unlocked after the previous set is exhausted. The same concept applies to the transcend stones.
  • Panel 1 costs 1,000 badges, Panel 2 costs 3,000 badges, and Panel 3 costs 6,000 badges, totaling 10,000 badges to get all 3 panels.
  • Gold badge income is currently 690 per month, assuming you clear level 10 of each area.

Silver badges

Exchange Lineup	Gold badge cost	Cap
Hell Genome Cube × 1	1,000	No Cap
Pixie Underside Genome	3,000	1
Sword of Kusanagi 5★	100	20 / Month
Yata Mirror 5★	500	5 / Month
Yasaka Magatama 5★	200	5 / Month
Kasane Magatama	3,000	2 / Month
Aether Crystal	1,000	1 / Month
Skip Ticket (Sin) x20	3,000	1 / Month
Essence of Sin x160	2,000	2 / Month
Mitama Extract St x10	300	5 / Month
Mitama Extract Ma x10	300	5 / Month
Mitama Extract Vi x10	300	5 / Month
Mitama Extract Ag x10	300	5 / Month
Mitama Extract Lu x10	300	5 / Month
Blank Genome	1,500	2 / Month
6★ Brand Cube	500	10 / Month

The Hell Genome Cube gives a random skill genome from a very large pool. A few of the skills are rare and exclusive:

Genome	Notes
Fortunate park visitor	Rare, exclusive
Trisagion Underside	Rare, exclusive
Ice Age Underside	Rare, exclusive
Struggle Slash Underside	Rare, exclusive
Fire Slash Underside	Rare, exclusive
Ice Slash Underside	Rare, exclusive

Guide

Spike Hell Area ( Heimdall)

Mandrake	Heimdall	King Frost	Mandrake

Resistances
Mandrake	-	Wk	Wk	-	-	-	Nu
Heimdall	-	Wk	Nu	-	Dr	Nu	Rs
King Frost	-	Wk	Nu	-	-	Rs	-
Mandrake	-	Wk	Wk	-	-	-	Nu
Battle Speed			10,000

Skills on multiple demons:

Skills on Mandrakes only:

Skills on Heimdall only:

Skills on King Frost only:

Team restrictions:

Difficulty	Restriction
Lv 3-5	3 or more demons must be fusible*.
Lv 6-8	4 or more demons must be fusible.
Lv 9+	All 5 demons must be fusible.
Lv 6+	1 or more demons must be grade 79 or lower.
Lv 9+	1 or more demons must be Clear.

Notes regarding fusibles:

• Multi-fusions count, but the limited-time multi-fusions do not count.
• Pixie and Slime count, even though you cannot fuse them.

Kawara Area ( Hresvelgr)

Feng Huang	Hresvelgr	Tsukuyomi	Feng Huang

Resistances
Feng Huang	Wk	Nu	Wk	-	-	-	-
Hresvelgr	Wk	Wk	Dr	-	Nu	-	-
Tsukuyomi	Wk	Nu	Nu	Rs	Rs	-	-
Feng Huang	Wk	Nu	Wk	-	-	-	-
Battle Speed			10,000

Skills on multiple demons:

Skills on Feng Huangs only:

Skills on Hresvelgr only:

Skills on Tsukuyomi only:

Team restrictions:

Difficulty	Restriction
Lv 3-5	All 5 demons must be of the races Genma, Kishin, Night, Drake, or Tyrant.
Lv 6-8	All 5 demons must be of the races Genma, Kishin, Night, or Drake.
Lv 9+	All 5 demons must be of the races Genma, Kishin, or Night.

Grave Area ( Mithras)

Shiki-Ouji	Mithras	Cybele	Shiki-Ouji
300x600px			300x600px

Resistances
Shiki-Ouji	Nu	Wk	Wk	-	-	Rs	Rs
Mithras	-	Dr	Wk	-	-	Nu	-
Cybele	-	Dr	Wk	-	Rs	Nu	Rs
Shiki-Ouji	Nu	Wk	Wk	-	-	Rs	Rs
Battle Speed			10,000

Team restrictions:

Difficulty	Restriction
Lv 3-5	3 or more demons must be grade 83 or lower.
Lv 6-8	4 or more demons must be grade 83 or lower.
Lv 9+	All 5 demons must be grade 83 or lower.
Lv 6-8	1 or more demons must be grade 79 or lower.
Lv 9+	2 or more demons must be grade 79 or lower.
Lv 9+	1 or more demons must be grade 59 or lower.

Misc

A Red Illuyanka was given out on Jan 20, 2025 with the exclusive skill Illuyanka Underside.