SHORT ANSWER
Multipliers stack multiplicatively, not additively, when multiple Fist Wilds cover the same payline on the same spin. Two Fists with 10x multipliers covering the same payline produce 100x on that payline's base win — not 20x. With 5 Fists at 200x each on the same payline, the combined multiplier would be 200x to the power of 5 — astronomically beyond 10,000x. The practical path involves 3 to 4 Fists with mid-range multipliers stacking simultaneously.

The multiplicative stacking rule

When two or more Fist Wilds contribute to the same winning payline combination, their multipliers multiply together. This is the critical mechanic that makes large wins possible. Two Fists with separate multipliers of 5x and 10x on the same payline produce a 50x combined multiplier — not 15x. Three Fists with 5x, 10x, and 20x on the same payline produce 1,000x.

This exponential growth is why Epic Spins — where 3 to 5 Fists are pre-loaded — create dramatically higher win potential than regular spins with occasional Wild appearances. The difference between one Wild with a 10x multiplier (10x on covered paylines) and three Wilds with 10x each (1,000x on shared paylines) is two orders of magnitude.

What Epic Spins actually look like

When the bonus escalates to Level 4+ (via Victory Point accumulation or Ultimate Throwdown! buy), spins enter Epic mode with Fist symbols pre-loaded. Here is what different Epic Spin configurations produce:

FISTS PRE-LOADEDMULTIPLIER SCENARIOCOMBINED MULTIPLIERWIN AT 1x BASE
3 Fists3x, 5x, 10x same payline150x150x stake
3 Fists20x, 20x, 20x same payline8,000x8,000x stake
4 Fists10x, 10x, 10x, 10x same payline10,000x10,000x stake — max win
5 Fists5x, 5x, 5x, 5x, 5x same payline3,125x3,125x stake
5 Fists10x, 10x, 10x, 10x, 10x same payline100,000x (capped at 10,000x)10,000x — capped

The payline alignment requirement

The multiplier stacking only applies to paylines where all contributing Wilds overlap. A Fist in column 1 covering rows 1 to 4 and a Fist in column 3 covering rows 2 to 4 share paylines that run through rows 2 to 4 of both columns — those shared paylines get the combined multiplier. Paylines running through row 1 of column 1 but not column 3 only get the column 1 Fist's multiplier.

This geometry requirement is the primary reason Epic Spins with maximum Fist counts do not always produce maximum multiplier stacking. The Fists need to be positioned such that their expanded positions share paylines. A poorly positioned set of five Fists might produce less than optimal stacking despite the high Fist count.

The practical path to 10,000x

Based on the math, the most realistic 10,000x scenario involves 3 to 4 Fists in columns 1 to 3 — covering the highest-density payline zones — each carrying multipliers in the 20x to 50x range. This requires Epic Spin state (Level 4+), favourable Fist column positioning, and mid-to-high multiplier values from Fighter punches on that spin.

The probability of all conditions aligning on a single Epic Spin is low — but the game structure is designed to give you multiple Epic Spins within a single bonus round once you reach Level 4+. Each Epic Spin is a fresh lottery ticket for the required conditions. Over 5 to 10 Epic Spins in a single bonus, the cumulative probability of at least one producing a large stacked multiplier event becomes non-trivial.

The 10,000x cap: The game caps total wins at 10,000x stake. This means mathematically possible multiplier combinations above 10,000x — like five Fists with 10x each producing 100,000x theoretically — are paid at 10,000x. The cap protects both the developer and the casino from extreme outlier payouts while maintaining the stated maximum win figure.

BOTTOM LINE
Multipliers stack multiplicatively during free spins when multiple Fist Wilds cover the same paylines. The 10,000x max win requires 3 to 4 Fists with mid-to-high multipliers — roughly 20x to 50x each — aligning on shared paylines in an Epic Spin. This requires reaching Level 4+ bonus state via VP accumulation or the Ultimate Throwdown! buy, then drawing favourable Fist positions and multiplier values on the same spin. Rare, but the mathematics make it genuinely achievable.