Gluttony - Beelzebub Build Guide

Gluttony - Beelzebub portrait

Gluttony - Beelzebub

Debuffer class icon
Bicta Tower
SSR Ice Debuffer Debuffer

Gluttony - Beelzebub is an Ice debuffer focused on energy control and tempo. Her kit drains enemy energy, accelerates allied energy, and applies a wide teamwide swing through [Gluttony] and [Return], making her strongest when she can cycle ultimates quickly and survive long enough to keep disrupting the enemy team's flow.

Skill Priority

Skill level recommendations for F2P non-spender:

1
Ultimate: Frozen Feedback
Level 10
Energy Cost: 3 Deals 732.9% Frost damage to all enemies and inflicts [Gluttony], reducing enemy attack power by 60.1%, defense by 72.9%, and energy recovery efficiency by 10% for 5 seconds. At the same time, all allies gain [Return], increasing attack power by 60.1%, defense by 72.9%, and energy recovery efficiency by 20% for 5 seconds.
2
Passive: Taotie taxation
Level 10
Upon entering battle, activate [Gluttony Authority] to immediately reduce the enemy's energy by 2 points, while your side gains 2 points of energy, but the energy acquisition efficiency is reduced by 15.7% for 7 seconds.
3
Auto Skill: Cold Deprivation
Level 10
Cooldown: 7.0s Deals 488.6% attack damage as Frost damage to the designated enemy unit and reduces the enemy's energy by 1.
4
Normal Attack: Cold Devour
Level 7
Cooldown: 2.0s Deals Frost damage equal to 120% attack power to the designated enemy unit.

Recommended Memory Cards

These are the best memory cards for Gluttony - Beelzebub:

Nutrition Studies memory card
Nutrition Studies ★ Exclusive
Highly Recommended
HP increased by 40%. Attack power of the entire team increased by 20%. After the wearer uses a skill, inflicts [Drain] on all enemies for 4 seconds. [Drain] reduces enemy energy regeneration efficiency by 10% and increases allied energy regeneration efficiency by 10%.
Stats: HP 6,000 / ATK 600 / DEF 600

Alternative Memory Cards

Good alternative options if you don't have the recommended cards:

Sleepy Guardian memory card
Sleepy Guardian
Ultimate skill can reduce targets energy regen by 18%.
Note: A lower-investment option if you want to lean harder into energy control rather than raw stat value.
Stats: HP 5,200 / ATK 420 / DEF 380

Runes Priorities

Focus on these rune stats for Gluttony - Beelzebub:

Primary Stat:
Attack%
Secondary Stat:
HP / Defense

Highly Recommended Stats:

ATK% HP% DEF%

Additional Stats:

ATK HP DEF
Build Note: Beelzebub's damage and team-skill scaling are attack-based, but her job is still to stay alive long enough to keep disrupting enemy energy. Prioritize Attack% first, then add HP and Defense so she can reliably reach multiple ultimate cycles.

Recommended Rune Sets:

Tide rune (4-piece)
4-piece
+
Alpha rune (2-piece)
2-piece
Tide [Energy] 4-piece + Alpha 2-piece
2-piece (Tide): 2-piece: Defense increased by 12%
4-piece (Tide): 4-piece: Within 10 seconds after combat starts, your team's energy gain efficiency is increased by 30%
2-piece (Alpha): 2-piece: Attack Power +8%

Alternative Builds:

Tide rune (4-piece)
4-piece
+
Zahn rune (2-piece)
2-piece
Tide [Energy] 4-piece + Zahn 2-piece
2-piece (Tide): 2-piece: Defense increased by 12%
4-piece (Tide): 4-piece: Within 10 seconds after combat starts, your team's energy gain efficiency is increased by 30%
2-piece (Zahn): 2-piece: HP +8%
Daleth rune (4-piece)
4-piece
+
Alpha rune (2-piece)
2-piece
Daleth 4-piece + Alpha 2-piece
2-piece (Daleth): 2-piece: Healing Effectiveness +10%
4-piece (Daleth): 4-piece: Battle Start: Gain 1 Energy immediately
2-piece (Alpha): 2-piece: Attack Power +8%

Main Stats by Position

Recommended main stats for each rune position for Gluttony - Beelzebub:

Position 1 - Fixed Main Stat

HP (Flat Value)

Always HP - no other options

Position 2 - Fixed Main Stat

Attack (Flat Value)

Always Attack - no other options

Position 3 - Fixed Main Stat

Defense (Flat Value)

Always Defense - no other options

Position 4 - Variable Main Stats

Available Options:
Healing Effectiveness (%) Critical Rate (%) Critical Damage (%) Attack Penetration (%) Attack (%) HP (%) Defense (%)

Attack % gives the most value to her damage and helps her team-skill threshold scaling.

Position 5 - Variable Main Stats

Available Options:
Wind Attribute Damage (%) Fire Attribute Damage (%) Ice Attribute Damage (%) Holy Attribute Damage (%) Chaos Attribute Damage (%) Attack (%) HP (%) Defense (%)

Attack % is the safer all-purpose option for support value, while Ice Damage helps her personal damage if you want more pressure.

Position 6 - Variable Main Stats

Available Options:
Attack (%) HP (%) Defense (%)

Attack % is best for tempo and damage, but HP % is fine if you need more survivability in longer fights.

Awakening Priority

A1 and A6 are the biggest quality spikes. A2 is also strong if you want to push her energy-control role harder.

A1 Very Good

Upon entering battle, the first ultimate skill does not consume energy.

A2 Good

Beelzebub's skill effect is enhanced, reducing the enemy's energy by 2 and increasing our energy by 1.

A3 Mid

[Normal Attack], [Skill], [ULT] and [Passive] level and level cap +2.

A4 Very Good

Our entire party's HP is increased by 20%, and the effects of our ultimate skills [Gluttony] and [Repayment] are increased from 5 seconds to 8 seconds.

A5 Mid

[Normal Attack], [Skill], [ULT] and [Passive] level and level cap +2.

A6 Very Good

All allies gain 10% All Resistances, while all enemies lose 10% All Resistances.

Team Synergy

Good Teammates:

Bicta Tower teammatesIce attribute teamsUltimate-reliant carriesEnergy control / tempo teams

Beelzebub works best in teams that care about winning the energy race. She gains value whenever her team can convert the extra energy from [Gluttony Authority], [Return], and Nutrition Studies into faster ultimates while the enemy team is delayed.