Crucially, expanded symbols pay across all active paylines even if the reels containing them are not adjacent to each other.
This expanding-symbol mechanic is where Legacy of Dead's major payouts originate. A single round where Tutankhamun is selected as the expanding symbol and lands on three or more reels can produce payouts hundreds of times the original bet.
Now, here is the mechanic that genuinely sets Legacy of Dead apart from most other "Book of" slots, including its predecessor.
If three or more Scatter symbols land during an active free spins round, the game awards an additional 8 free spins and selects a second expanding symbol. This retrigger process can repeat until all 9 regular paying symbols have been designated as expanding symbols simultaneously.
In theory, a player who retriggers enough times could have every symbol on the reels expanding to fill entire columns. That scenario dramatically increases the probability of full-screen wins. While this outcome is extraordinarily rare, it represents the mathematical ceiling that underpins the 5,000x maximum win.
The row of symbols displayed just above the reels acts as a visual tracker: symbols that have been selected as "special" appear in colour, while those still unselected remain greyed out. This interface element, unique to Legacy of Dead, helps players instantly understand how many expanding symbols are active during a bonus round.