King of Heroes (Merciless) is the 3rd stage of Holy War: Gilgamesh. Previous stage: King of Heroes (Deadly).
RUSH STAGEPush early: get durable close-range attackers inside Gilgamesh's blind spot before his support builds up.
Gilgamesh with a growing support wave; Elder Sloth's knockbacks are the main complication, and slow fragile backliners struggle here.
- Establish cats inside Gilgamesh's blind spot before the supporting enemies accumulate.
- Durable short-range attackers do better than slow, fragile backliners.
- Bring anti-Alien damage for the support; a Zombie Killer is optional for the Zombie peons.
- Catellite's Slow buys time against Elder Sloth's knockbacks.
The collab's strongest enemy: 1,500,000 HP, a three-hit 5,000 x3 area attack from Long Distance 600~1,100, and +100% attack at 50% HP. His blind spot is the whole 600 in front of him, so units that get inside it are safe.
CATELLITE A Catellite slows the push and keeps Elder Sloth's knockbacks manageable. 
MOHAWK CAT C Cheap shields to keep the line while you push. 
ERASER CAT S Second cheap shield. 
JAMIERA CAT A Jamiera — a durable short-range attacker for the blind spot. 
CAN CAN CAT A Can Can gets inside the blind spot fast. 
SHIGONG CAT A Shigong's Zombie Killer for the Zombie peons (optional). ⚙ Trait counters worked out from the roster — not the plan on this stage, kept for reference
Zoge and Zang Roo revive after dying — without a Zombie Killer they keep coming back. Bring one to end the loop.
ZOMBIE CAT B Zombie Killer — stops the revive so it stays dead. Also fits “Clear the crowd.” 
TEACHER BEARCAT A Zombie Killer — stops the revive so it stays dead. Also fits “Counter Traitless.” 
PILEDRIVER CAT A Zombie Killer — stops the revive so it stays dead. Also fits “Clear the crowd.” 
MIGHTY REKON KORPS S Zombie Killer — stops the revive so it stays dead. Also fits “Burst the boss down.” 
MR. B Zombie Killer — stops the revive so it stays dead. 
VENGEFUL CAT D Zombie Killer — stops the revive so it stays dead. Also fits “Clear the crowd.” Gilgamesh is Traitless. Anti-Traitless units take less damage and deal more.
HITMAN CAT A Hitman Cat: Deals massive damage to Traitless enemies Also fits “Clear the crowd.” TEACHER BEARCAT A Insane Damage vs Traitless (Normal form). Also fits “Stop the revives.” 
BRAINWASHED AXE CAT A Strong against Traitless and Curses Traitless enemies. 
D'ARKTANYAN S Strong Against Traitless on a Long-Distance area attack — answers the many Traitless bosses. Also fits “Clear the crowd.” 
JAGANDO JR. A Lord of Ruin Jagando Jr.: Strong against Traitless enemies (Deals 1.5x damage, only takes 1/2 damage) Also fits “Clear the crowd.” Gilgamesh reaches 600 range. Units that out-range it can chip safely without taking hits.
Gilgamesh has a deep HP pool (1,500,000+ 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. MIGHTY REKON KORPS S Among the highest single-hit Area damage available. Also fits “Stop the revives.” 
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. Also fits “Clear the crowd.” 8 enemy types stack up here. Area attackers hit the whole push at once instead of one unit at a time.
HITMAN CAT A Area attacks hit everything in range. Also fits “Counter Traitless.” VENGEFUL CAT D Area attacks hit everything in range. Also fits “Stop the revives.” 
KOTOMINE & GILGAMESH CATS B Area attacks hit everything in range. Also fits “Stop the revives.” MIGHTY REKON KORPS S Long-range (Omni Strike in True) Area clears groups front and back. Also fits “Stop the revives.” JAGANDO JR. A Area attacks hit everything in range. Also fits “Counter Traitless.” 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 ↗
The castle you destroy to clear the stage.