BOSS
QUEEN MOTHER V
I'll Big Bug is the 2nd stage of The Old Queen. Previous stage: I'll Be Bug. Next stage: Be Bee Queen.
STRATEGY
A copy of I'll Be Bug with only five deploy slots, which turns out to matter far less than it sounds.
- Sushi Cat, Ancient Egg: N101 and Bahamut Cat already did most of the work in the original.
- That leaves two slots spare, which can be spent on a Cat Combo despite the restriction.
- In practice the stage plays almost identically to I'll Be Bug.
ENEMY ROSTER · 5
CATS TO BRING 
ROE CAT A As with the previous stage, Roe Cat has the health to act as a tank against Professor A. with its Resistance and has a 20% Weaken chance against Red enemies for support, making it crucial for the stage. As always, time it properly to avoid Queen Mother V's attacks. Recommended Lv.40 or above. 
AWAKENED BAHAMUT CAT S Awakened Bahamut Cat’s high burst damage is very useful here. He would be a big source of damage to Professor A. with proper timing, especially if aided by Roe's anti-Red weaken/Thunderbolt. His speed helps him to evade Queen Mother V's attacks. 
CAN CAN CAT A Can Can's very high damage, low cost and Extra Money talent all help in picking off the annoying peons, but should not be relied upon when fighting Professor A. 
BULLET TRAIN CAT A Thanks to its incredibly high speed, Bullet Train continues to be a useful chipper that can guarantee at least one hit on Professor A. if the path is clear. It also comes into use at sniping other peons should the need arises. 
MANIC ISLAND CAT A Manic Island continues to serve as a cost-effective anti-Red specialist that is strong against them, although the lack of combos if opting for it can reduce its effectiveness. 
SLIME CAT A Unlocked from the previous stage, Slime Cat possesses a devastating Wave Attack that can provide a lot of value. But make sure to time them well. Thunderbolt Cannon is useful to force a hit in. 
NEO CUTTER CAT A Neo Cutter Cat can burst out a ton of damage onto the Red enemies in this stage. You can even consider his Attack Combo. 
GREATER BALROG CAT S Single-target DPS unit that basically acts as a better Can Can and is insidiously effective. He works very well with his Strengthen/Cost Down Talents to wipe out the One Horns as well as the Relic Doges, while being replaceable easily if lost. His weakness to Professor A. 
KING OF DESTINY PHONOA S Though vulnerable to Curse, Phonoa's very high speed (30), far-reaching LD multi-hits and huge standing range (600 vs 501) means it can utterly reduce every enemy in the stage to rubble. 
CAT MACHINE MK 3 A As long as Cat Machine is not cursed, Cat Machine will whittle down Queen Mother V's and Professor A's health. A level 40 Cat Machine can survive long enough for another Cat Machine, allowing for stacking. Speed up talents and combos are recommended. 
HYPER BATTALION CONVOYS S Essentially a much stronger Roe, Convoys can easily infiltrate Queen Mother V's blind spot and prevent Professor A. from attacking your other units by constantly knocking him back, allowing your other units free rein to attack the vulnerable Mother V with barely any resistance. 
LUNOS THE LUMINOUS A While still vulnerable to the Red peons in this stage, his Conjure can help relief the pressure of this stage and push the enemies back to the base. Both his forms work, however, his Evolved Form is preferred for extra bulk to make it to the frontlines. 
SABER THE CAT C Saber Alter Cat: Strong against Floating enemies (Deals 1.5x damage, only takes 1/2 damage) 
ARCHER CAT A Deals Massive Damage to Floating enemies. 
DELINQUENT CAT A Multi-Hit Area damage + Freeze vs Floating. Also fits “Counter Relic.” 
CATMAN S Massive Damage vs Floating (Normal). Also fits “Counter Relic.” 
HIGH LORD BABEL S Equally tough against Floating enemies, with Colossus Slayer. 
MASTER URIL A Esoteric Uril: Strong against Relic, Aku (Deals 1.5x damage, only takes 1/2 damage) 
CALLIGRAPHY CAT A Strong against Relic from long range, Curse-immune. DELINQUENT CAT A True Form also targets and freezes Relic. Also fits “Counter Floating.” CATMAN S Massive Damage vs Relic (True). Also fits “Counter Floating.” 
RED RIDING MINA A 50% Weaken vs Relic softens Relic enemies for the rest of your team. BAHAMUT CAT S Huge multi-hit burst — a story-unlock powerhouse that deletes tanky enemies. CHILD OF DESTINY PHONO S Big Multi-Hit Massive-Damage bursts from safety. 
GAIA THE CREATOR S Long-Distance multi-hit with Insane Damage — a generalist wall-cracker. 
CRAZED MONEKO A Big crit burst against tanky/Metal targets. 
IZ THE DANCER S Big Multi-Hit Massive-Damage bursts.
★ PICKED FOR THIS STAGE
ROE CAT A As with the previous stage, Roe Cat has the health to act as a tank against Professor A. with its Resistance and has a 20% Weaken chance against Red enemies for support, making it crucial for the stage. As always, time it properly to avoid Queen Mother V's attacks. Recommended Lv.40 or above. AWAKENED BAHAMUT CAT S Awakened Bahamut Cat’s high burst damage is very useful here. He would be a big source of damage to Professor A. with proper timing, especially if aided by Roe's anti-Red weaken/Thunderbolt. His speed helps him to evade Queen Mother V's attacks. CAN CAN CAT A Can Can's very high damage, low cost and Extra Money talent all help in picking off the annoying peons, but should not be relied upon when fighting Professor A. BULLET TRAIN CAT A Thanks to its incredibly high speed, Bullet Train continues to be a useful chipper that can guarantee at least one hit on Professor A. if the path is clear. It also comes into use at sniping other peons should the need arises. MANIC ISLAND CAT A Manic Island continues to serve as a cost-effective anti-Red specialist that is strong against them, although the lack of combos if opting for it can reduce its effectiveness. SLIME CAT A Unlocked from the previous stage, Slime Cat possesses a devastating Wave Attack that can provide a lot of value. But make sure to time them well. Thunderbolt Cannon is useful to force a hit in. NEO CUTTER CAT A Neo Cutter Cat can burst out a ton of damage onto the Red enemies in this stage. You can even consider his Attack Combo. GREATER BALROG CAT S Single-target DPS unit that basically acts as a better Can Can and is insidiously effective. He works very well with his Strengthen/Cost Down Talents to wipe out the One Horns as well as the Relic Doges, while being replaceable easily if lost. His weakness to Professor A. KING OF DESTINY PHONOA S Though vulnerable to Curse, Phonoa's very high speed (30), far-reaching LD multi-hits and huge standing range (600 vs 501) means it can utterly reduce every enemy in the stage to rubble. CAT MACHINE MK 3 A As long as Cat Machine is not cursed, Cat Machine will whittle down Queen Mother V's and Professor A's health. A level 40 Cat Machine can survive long enough for another Cat Machine, allowing for stacking. Speed up talents and combos are recommended. HYPER BATTALION CONVOYS S Essentially a much stronger Roe, Convoys can easily infiltrate Queen Mother V's blind spot and prevent Professor A. from attacking your other units by constantly knocking him back, allowing your other units free rein to attack the vulnerable Mother V with barely any resistance. LUNOS THE LUMINOUS A While still vulnerable to the Red peons in this stage, his Conjure can help relief the pressure of this stage and push the enemies back to the base. Both his forms work, however, his Evolved Form is preferred for extra bulk to make it to the frontlines. ⚙ More counters worked out from the roster, lower confidence than the picks above; kept for reference
Counter Floating
Queen Mother V is Floating. Anti-Floating units take less damage and deal more.
SABER THE CAT C Saber Alter Cat: Strong against Floating enemies (Deals 1.5x damage, only takes 1/2 damage) ARCHER CAT A Deals Massive Damage to Floating enemies. DELINQUENT CAT A Multi-Hit Area damage + Freeze vs Floating. Also fits “Counter Relic.” CATMAN S Massive Damage vs Floating (Normal). Also fits “Counter Relic.” HIGH LORD BABEL S Equally tough against Floating enemies, with Colossus Slayer. Counter Relic
Queen Mother V is Relic. Anti-Relic units take less damage and deal more.
MASTER URIL A Esoteric Uril: Strong against Relic, Aku (Deals 1.5x damage, only takes 1/2 damage) CALLIGRAPHY CAT A Strong against Relic from long range, Curse-immune. DELINQUENT CAT A True Form also targets and freezes Relic. Also fits “Counter Floating.” CATMAN S Massive Damage vs Relic (True). Also fits “Counter Floating.” RED RIDING MINA A 50% Weaken vs Relic softens Relic enemies for the rest of your team. Out-range Queen Mother V
Queen Mother V reaches 999 range. Units that out-range it can chip safely without taking hits.
Burst the boss down
Queen Mother V has a deep HP pool (1,555,555+ even before stage magnification). Heavy single-target burst shortens the fight.
BAHAMUT CAT S Huge multi-hit burst — a story-unlock powerhouse that deletes tanky enemies. CHILD OF DESTINY PHONO S Big Multi-Hit Massive-Damage bursts from safety. GAIA THE CREATOR S Long-Distance multi-hit with Insane Damage — a generalist wall-cracker. CRAZED MONEKO A Big crit burst against tanky/Metal targets. IZ THE DANCER S Big Multi-Hit Massive-Damage bursts. VIDEO RUNS
WIKI PICK = listed on the stage's Battle Cats Wiki page; COMMUNITY = found by title, channel and date. Neither is verified by Claws' Den. Nothing loads from YouTube until you press play. Find more on YouTube ↗
ENEMY BASE 
BASE HEALTH
1,111,111
The castle you destroy to clear the stage.
STAGE DATA
SAGAEvents
CHAPTERThe Old Queen
ENEMIES5
DIFFICULTYMerciless
RUNS ON1st, 2nd, 15th & 16th of each month
TREASURE1,000,000 XP
RESTRICTIONRow 1+1
MORE IN THE OLD QUEEN All 3 stages