Be The Final Boss Secret Units: Skull King, Demon Lord, Doomfist
Illustrated guide to the Secret units in Be The Final Boss — who they are, how rolling for them works, and what Demonic Skull King does in a lineup.
Quick answer
Be The Final Boss has three Secret units: Skull King, Demon Lord, and Doomfist. You get them by rolling at the Summon Altar with souls — the creator of this walkthrough spent around eight hours rolling for his first Skull King, and the Rolls leaderboard he reads on camera sits above 66,000 rolls. Mutations run normal, shiny, cursed, then Demonic, and he tells players not to chase Demonic versions before roughly wave 400. His Demonic Skull King is a front-line Guard that heals: in his test a level 1 copy carried a run to wave 575.
Video source
Walkthrough based on KingGoose's published gameplay "How good is DEMONIC Skull King??". Every number — the 8-hour roll grind, the wave 575 test, the roughly +25 wave gain — is his observed result on his own account, not a universal rate.
KingGoose — How good is DEMONIC Skull King??Getting the Secret units, step by step
- 1
Know the three Secret units
The Secret tier shown in the video includes Skull King, Demon Lord, and Doomfist — the same three Secret records in our units list. On the creator's updated tier list, Skull King sits in S tier (he moved it up after getting the Demonic version), Demon Lord lands in B, and Doomfist is low C. Skull King and Doomfist both show Cost 4 on their cards, so raise your population before you start hunting.
The creator’s updated rankings after pulling the Demonic Skull King: Doomfist sits down in low C. - 2
Roll for them at the Summon Altar
Secrets come from spending souls on rolls at the Summon Altar — the video shows no craft path or pity counter. The Rolls leaderboard he reads early on puts rank 100 above 66,000 rolls, and he says his first Skull King took around eight hours of rolling. He farms souls by leaving a run running AFK in a private server and credits the lower ping for what he describes as better rates — his claim, not an official mechanic. Let Auto Buy handle shard upgrades in the background so your souls stay reserved for rolling.
Secrets are a numbers game — every player on this board has passed 66,000 rolls. - 3
Mutations: normal, shiny, cursed, Demonic
Every unit can roll with a mutation, and the video ranks them normal < shiny < cursed < Demonic — leveled fairly, they end up around the same power until max levels, in his experience. His advice: don't chase Demonic versions before roughly wave 400, because you probably cannot farm souls effectively yet. The Demonic Skull King card he opens reads level 3, 6,300 ATK, and 81,900 HP — his stats after upgrading, not a drop value.
His level 3 card after upgrading: two built-in healing skills make the tank self-sufficient. - 4
What Demonic Skull King does in a lineup
It is a front-line Guard tank that heals. The card lists Active: Deep Recovery (restore 40% max HP) and Passive: Pain Recovery, and his instructions are simple: put it in front, let it soak damage, and it keeps itself alive. In his test, a level 1 Demonic Skull King at 60 population carried a run to wave 575 and could not crack 600 alone — supporting units still matter. Adding it to his lineup pushed his waves by about 25, and he calls it the best unit he has ever used; that is his result on his account, not a universal rating.
Skull Kings anchor the middle of the pack while mutated skeletons deal damage around them. - 5
Set expectations before you chase one
Even for a top-100 roller the hunt is slow: while hunting a Demonic Demon Lord in this video he pulled regular Demon Lord twice in a row. Cheaper stepping stones exist — he calls the normal Skull King a huge but worthwhile 200k investment and ranks the Demonic Mighty Orc as the game's second-best tank, far cheaper to chase. Keep leveling Demonic Skeleton Archers too; his level 43 archers were still his main damage source at the time.
The channel’s budget stepping stone into late-game tanks before committing to Secret hunts.