How to Beat the Demon King

Preparing for the final fight

The Demon King is the final boss of Master Healer Kale with useless party, the culmination of Evrac Studio's incremental healer RPG released on Steam in July 2026. By the time you reach this encounter, you should have cleared the majority of sixteen plus dungeons, unlocked most of Kale's eighteen spells, and invested heavily across the two-hundred-plus node skill tree. If you are not there yet, follow the late dungeons walkthrough and post-game section before attempting the fight.

Preparation starts outside the boss room. Confirm your build matches endgame expectations — most players succeed with a healer-focus or balanced layout from the builds hub, though high-investment party damage setups can work if mana sustain is solved. Use the skill point planner to verify you have key late-game nodes from the late-game skill tree. If your allocation is scattered, consider one final respec using the respec guide.

Equip your best mana and healing items from the items page, set your spell bar for maximum survival, and review controls so every heal is one button press away. Enter the fight at full mana with all cooldowns ready. The Demon King does not forgive wasted resources — apply everything you learned from the mana management and party survival guides here.

Phase one: establishing control

Phase one introduces the Demon King's basic attack pattern: heavy melee swings targeting Grandpa Bagel, periodic shadow bolts aimed at Madeleine or Klepon, and a slow enrage timer that increases attack speed over time. Your priority is stabilizing the tank while establishing buff uptime on the entire party. Pre-cast defensive buffs from the buff spells guide before engaging and refresh them during the first lull.

Grandpa Bagel will take consistent damage even with buffs — keep him above sixty percent health at all times during phase one. Use efficient mid-cost heals rather than emergency spells so your mana bar stays above seventy percent heading into phase two. Madeleine and Klepon handle damage automatically, but watch for shadow bolts; a heal on Klepon after each bolt prevents backline deaths from accumulated chip damage.

Offensive contribution from Kale is optional in phase one. If your mana allows, cast low-cost damage spells from the offensive section during safe windows to shorten the phase. Faster phase one means fewer total attacks to heal through. Do not let damage casting delay your buff refreshes — falling behind on prevention makes phase two significantly harder.

Phase two: burst windows and adds

At roughly half health, the Demon King transitions to phase two with faster attacks, a ground slam that hits the entire party, and periodic add spawns. This is where most failed runs occur. The ground slam has a visible telegraph — pre-buff Grandpa Bagel and be ready to cast a party-wide heal immediately after impact. If anyone survives below thirty percent, follow with your strongest single-target heal on the lowest member.

Adds spawn at the edges of the arena and target Klepon first. You cannot control party positioning, so respond with fast single-target heals on Klepon while maintaining a heal-over-time or passive regen on Grandpa Bagel. Ignore adds from a damage perspective — Madeleine's area spells and Klepon's arrows will clear them if the backline survives long enough. Triage knowledge from the party overview is critical here.

Mana management becomes tight in phase two. Use active regeneration abilities during the brief pause after each add wave dies. If you followed the mid-game and late-game mana investments, your passive regen should cover routine damage, leaving active spells for slam recovery and emergency saves. Drop offensive casting entirely if mana dips below fifty percent.

Phase three: enrage and closing the fight

Phase three begins when the Demon King enrages, gaining increased attack speed and a pulsing aura that deals damage over time to the whole party. This phase is a race — your party's auto-damage must burn the remaining health before your mana runs out. Every heal must be intentional. Overheal wastes precious resources; undert heal causes wipes.

Rotate your strongest heals on Grandpa Bagel while using area heals after each aura pulse. Save your longest cooldown for the final twenty percent of boss health, when attack frequency peaks. If Madeleine or Klepon die during enrage, continue healing Grandpa Bagel — as long as the tank stands, auto-damage may still finish the fight. Revive mechanics, if unlocked through skill tree nodes, can clutch a win here.

Victory unlocks post-game content covered in the post-game walkthrough and contributes to several achievements. If you wipe repeatedly, farm rubies in the hardest cleared dungeon from the dungeon list, invest in remaining skill points, and retry. The incremental nature of the game means every attempt makes Kale stronger — even failure against the Demon King pushes you closer to the final victory screen.