How do you get units in Be The Final Boss?

By summoning at the Summon Altar in your castle yard and paying with Souls. The altar offers a manual Roll and an Auto Roll option on the same Goblin Rolly prompt, and Auto Roll can pause on any rarity from Uncommon up to Secret. Nothing in this footage shows crafting, quest rewards, or enemy drops as ways to obtain units.

Can you buy a specific unit instead of rolling for one?

Not on camera. The creator says he 'actually went through and bought everything for normal', which implies a direct purchase exists, but neither capture opens an altar price list or a buy screen, so no unit-by-unit purchase flow is documented here. The only numbers stated out loud are his own: 200,000 for a normal Skull King and 3 million for a Demonic one.

Is Auto Roll free in Be The Final Boss?

The panel header says 'Free Auto Roll' above the AFK Roll and Stop on Rarity toggles, with Auto Roll Plus+ listed below as a separate unlock, so the game clearly splits a free tier from a paid one. No price is legible in either capture, and KingGoose's own copy was gifted to him by a friend — gifting was one of the Update 3 features — which is the only acquisition route for it shown here.

What is the difference between Summon Rolls and Summons?

Unknown from the footage. The STATS panel shows them as two rows on the same account — 9,184 Summon Rolls against 25,829 Summons — and neither the interface nor the commentary defines either one. Treat them as totals, not as a rate: no drop rate, pity rule, or souls-per-roll figure is published in this video.

How to Get Units in Be The Final Boss: Summon Altar, Souls, and Auto Roll

An illustrated, frame-checked walkthrough of unit acquisition in Be The Final Boss: the Summon Altar and its Roll button, Souls as the currency, Auto Roll stop settings, mutation tags on cards, and the population cap.

Quick answer

Every unit in this walkthrough comes from the Summon Altar in your castle yard, paid for with Souls — the purple gem in the HUD. Pull one at a time on the red Roll sign, or let Auto Roll run and stop on the rarities you tick, Uncommon through Secret. Each card lists a population Cost, so the skill tree's Population IX node ('Slot capacity increased to 50') decides whether you can even field a four-slot Secret such as Skull King. The footage publishes no drop rate, pity counter, or per-roll price, and this page does not invent one.

Video source

Frames checked against KingGoose's 25-minute 'Be The Final Boss Tier List', recorded on his 548-wave free-to-play account. The primary footage never opens the Auto Roll menu, so that one frame comes from a VendoPlus short, 'How to Auto Roll and Get More Units in Be The Final Boss Roblox'. Quoted UI labels are on screen; prices, opinions and roll advice are the creator's own, not published rates.

KingGoose — Be The Final Boss Tier List

How units are obtained, step by step

1
Roll at the Summon Altar in your castle yard
Units come from the Summon Altar, a lightning-ringed dais in the castle yard that the game labels with a Goblin Rolly NPC. The red Roll sign is the single pull and the E prompt beside it reads Auto Roll. A board on the altar counts how far you are from the next rarity — on camera it reads 'Legendary in 72 Rolls' and 'Mythic in 136 Rolls', while a third red line is not legible in this capture. A clover panel beside the button shows +134%, and the same account's skill tree carries a Summon Luck VII node reading 'Better odds when summoning units. Total +100%'. Rolls are paid in Souls, the purple gem counter reading 1,552,420 here, not in coins.
Rolls happen at this dais: the red sign is the manual pull, and the board next to it tracks how many rolls are left before the next Legendary and Mythic.
2
Set Auto Roll and choose what it stops on
The Auto Roll panel splits into three parts: a 'Free Auto Roll' header, two toggles — AFK Roll and Stop on Rarity, both switched On on camera — and a 'Pause on Rarity Settings' block with six buttons, Uncommon, Rare, Epic, Legendary, Mythic and Secret, which pick the pulls that halt the roll. Auto Roll Plus+ sits underneath as a separate unlock line, and no price for it is legible in either capture. KingGoose says a friend gifted him Auto Roll and tells viewers to get it if they can. Neither video shows how fast Auto Roll burns Souls, whether it can be bought outright, or what the free tier limits.
Auto Roll keeps pulling while you fight or go AFK, and the six rarity buttons decide which pulls make it stop.
3
Read rarity and Cost on the card before you spend
The UNITS panel shows what a pull is worth in slots. The Skull King card open on camera reads Lv.1 / Secret / Cost 4 / Guard, and a Skeleton Archer tooltip labels the same field 'Slots 1'. Mutations ride on the card as a tag instead of becoming separate units: this roster holds a Cursed Bone Guard, a Demonic Blood Gargoyle, a Demonic Barbarian and stacks of Demonic Skeleton Archers. The creator's spending advice follows from that — for Blood Gargoyle 'definitely go normal or demonic' because Shiny 'is not going to do you much', and for Bone Guard Cursed 'is the best variant because it's just so easy to find'.
Rarity and population Cost are printed on the card itself — Secret units take four slots, mutations ride along as a tag.
4
Raise your population cap before chasing big units
A unit you cannot place is a unit you cannot use. The skill tree's Population IX tooltip reads 'Place more units! Slot capacity increased to 50.', and the creator says reaching 50 population is what carries him. That cap is the real gate on the expensive pulls: Skull King and Demon Lord both show Cost 4, so at a low cap you can roll one and still be unable to field it. Population nodes share the tree with the Summon Luck chain, so the two compete for the same points — the footage never shows a node cost list.
A unit you cannot place is a unit you cannot use — Population IX is the node that lifts the cap to 50 slots.
5
Judge the grind against the roll counters
The STATS panel puts the scale on screen: 9,184 Summon Rolls and 25,829 Summons on an account whose highest wave is 548, alongside 420.4K heroes defeated and 5 check-in days. The game lists those two counters separately and neither the panel nor the commentary defines the difference, so read them as activity totals rather than rates. The only acquisition prices the video states out loud are the creator's own targets — Skull King is 'worth the 200,000 to get a normal one' and 'worth the 3 million' for a Demonic — under a general rule of 'don't waste your precious souls' on the units he ranks D tier.
The account on camera logged 9,184 Summon Rolls and 25,829 Summons to reach wave 548 — the game never explains how the two counters differ.