Shield of Sparta Slot by Pragmatic Play

Two types of bonus symbols share the grid, and the distinction between them is the entire trigger system. Regular bonus symbols carry a coin value and sit wherever they land. Magnetic bonus symbols do the same, but they also pull toward each other - when two or more Magnetic icons appear on the same spin, they lock in place and award a respin. Any new bonus symbol (regular or Magnetic) that lands during that respin resets the counter. The round keeps going until no new bonus symbols appear.

Free spins work differently. Landing 3, 4, or 5 scatters awards 10, 15, or 20 spins, and the grid marks specific positions with highlighted frames before the round starts. Those marked positions are where the upgrade mechanic lives. If a bonus symbol lands on a marked spot during free spins, it transforms into a higher-value version. The upgrade path means that even low-value coins picked up early in the round can contribute to bigger totals later, since new bonus symbols arriving in marked positions keep pushing the prize pool upward. No buy bonus option, so you're waiting for those scatters to line up naturally across the 20 paylines.

The premium symbols are bronze-toned character icons - a helmeted Spartan warrior in profile, a warship with a curved prow and red sail, a horse-drawn chariot mid-charge, crossed swords over a round shield. Below them, card royals from 10 through A sit on aged stone tablets. Everything leans into warm golds and burnt oranges, with a Greek coastal cliff backdrop behind the reels during base play - whitewashed columns, blue Aegean water, terracotta rooftops fading into haze.

The base game runs quiet. Twenty fixed paylines, no tumbles, no cascading multiplier, no progressive meter. Wilds substitute on paylines and that's it. All the voltage sits behind the scatter trigger and the bonus symbol lock-and-respin loop, where a full screen of upgraded coins at 3,000x is the theoretical ceiling.