3 Wonders Mystic Howl review | New slot from Boomerang Studios

3 Wonders Mystic Howl is a video slot from Boomerang Studios, released via the Yggdrasil GATI platform. The game uses a 5x3 layout with 243 ways to win and focuses on a Hold & Respin feature where different Scatter symbols can each add their own power-up. MULTI increases Coin prizes, MORE SPINS adds extra respins and COLLECT introduces Collector symbols. The maximum win is 3,198× the stake.

Game information

• provider: Boomerang Studios
• platform: released via the Yggdrasil GATI platform
• release date: 11 September 2026
• RTP: 94%
• volatility: medium-high
• layout: 5 x 3
• win mechanic: 243 Ways
• maximum win: 3,198× stake
• Coin values: 1× to 200× the total bet
• features: 3 Wonders Hold & Respin, MULTI, MORE SPINS and COLLECT
• type: video slot

What is 3 Wonders Mystic Howl?

3 Wonders Mystic Howl uses an arctic wolf theme with moonlight and the Northern Lights forming the backdrop. The game uses 243 Ways, with wins starting on the leftmost reel and continuing from left to right across consecutive reels.

The main feature is 3 Wonders Hold & Respin. One or more Scatter symbols can trigger this bonus, but not every Scatter has the same effect. Its colour determines which power-up is added to the feature.

There are three different Scatter types:

• green moon: MULTI
• pink moon: MORE SPINS
• blue moon: COLLECT

If several Scatters are part of the same trigger, different power-ups can be combined within a single Hold & Respin feature.

Main features

• 5x3 layout
• 243 Ways
• Wild on reels 2 and 4 in the base game
• Hold & Respin from one or more Scatters
• MULTI power-up
• MORE SPINS power-up
• COLLECT power-up
• Coin prizes from 1× to 200×
• Collector symbols
• extra respins from pink Scatters
• Coin multipliers from green Scatters
• all prizes doubled when the bonus grid is completely filled
• maximum win of 3,198× the stake

Wild symbols

The Wild can appear on reels 2 and 4 during the base game.

It substitutes for regular paying symbols to help form winning combinations. The Wild does not substitute for Scatter, Coin or Collector symbols.

During Hold & Respin, Coin and Collector symbols become the focus and regular base-game symbols do not appear.

Scatter symbols

The Scatter symbols determine how the bonus is built.

Each Scatter can activate the corresponding feature shown above the reels. Depending on its colour, the bonus can gain a multiplier, extra respins or Collector symbols.

The three power-ups work independently. If several different Scatters trigger at once, their effects can therefore be active together during the same Hold & Respin feature.

For example, a bonus can begin with additional respins, an increased Coin multiplier and one or more Collector symbols at the same time.

3 Wonders Hold & Respin

One or more Scatter symbols can trigger the 3 Wonders Hold & Respin feature.

The feature normally begins with 3 respins. The bonus grid starts empty unless the COLLECT power-up is active. In that case, Collector symbols are placed on the grid before the first respin begins.

Only Coin symbols can land in the remaining positions during Hold & Respin.

Whenever a Coin lands:

• it remains locked in position
• its displayed Coin prize becomes part of the bonus
• the remaining empty positions respin
• the respin counter is reset

Without additional power-ups, a new Coin resets the counter back to the original 3 respins. With MORE SPINS active, that starting number can be higher.

Coin symbols

Coin symbols appear only during the Hold & Respin feature.

Possible values are: 1×, 2×, 3×, 4×, 5×, 6×, 7×, 8×, 25×, 50× and 200× the total bet.

Each Coin remains locked after landing while the other positions respin.

When MULTI is active, the Coin prize is immediately multiplied by the accumulated Total Multiplier as soon as it lands.

MULTI

The green moon Scatter activates the MULTI power-up.

Before the first respin, each triggering green Scatter increases the Total Multiplier used during Hold & Respin.

All Coin prizes that land afterwards are immediately multiplied by this Total Multiplier.

MULTI therefore affects every new Coin prize rather than a single selected Coin. Several green Scatters in the triggering spin can increase the Total Multiplier further before the first respin starts.

MORE SPINS

The pink moon Scatter activates MORE SPINS.

Each triggering pink Scatter increases the number of extra respins added to the bonus.

These additional spins are added to the standard 3 respins. Whenever a new Coin lands during the feature, the counter resets back to this increased starting total.

MORE SPINS therefore continues to influence the bonus throughout the entire Hold & Respin feature rather than only at the beginning.

COLLECT

The blue moon Scatter activates the COLLECT power-up.

For each triggering blue Scatter, one Collector symbol is added to the bonus grid. Collectors are placed from the top-left corner of the grid and continue from left to right.

Each Collector then collects the prize value of every new Coin that lands during Hold & Respin.

If several blue Scatters trigger the bonus, multiple Collector symbols can therefore be active at the same time. This allows the value of one newly landed Coin to be collected by several Collectors during the same feature.

Full bonus grid

If every position on the bonus grid is filled during the 3 Wonders Hold & Respin feature, the bonus ends immediately.

At that point, all accumulated prizes are doubled.

Filling the entire grid therefore represents the strongest end goal within the feature. The final bonus win consists of all accumulated Coin values, including any increases from MULTI and collected values from COLLECT.

Combining the power-ups

The three Scatter power-ups can be combined within the same Hold & Respin feature.

This means the bonus can start with:

• an increased Total Multiplier through MULTI
• extra respins through MORE SPINS
• one or more Collector symbols through COLLECT

The combination of these effects determines how strongly the bonus can develop.

MULTI increases the value of new Coins, MORE SPINS gives additional opportunities to fill the grid, and COLLECT allows new Coin prizes to be collected again.

When several power-ups are active at the same time, these mechanics can therefore strengthen one another within the same bonus structure.

Why 3 Wonders Mystic Howl stands out

3 Wonders Mystic Howl stands out because one Hold & Respin feature can be enhanced in several different ways.

Each of the three Scatter colours has its own function and directly affects the bonus before the first respin begins.

The green Scatter increases Coin prizes, the pink Scatter adds more respins, and the blue Scatter introduces Collector symbols.

As a result, not every bonus plays out in exactly the same way. The combination of Scatters in the triggering spin determines how much potential there is for multipliers, extra spins and collected Coin values.

The doubling of all prizes when the bonus grid is completely filled adds another clear reward for a strong Hold & Respin sequence.

Is 3 Wonders Mystic Howl worth playing?

3 Wonders Mystic Howl is well suited to players who enjoy Hold & Respin slots with several power-ups working within the same bonus.

With 243 Ways, three different Scatter mechanics, Coin prizes up to 200× and a maximum win of 3,198× the stake, this Boomerang Studios release combines a straightforward base structure with a more varied bonus feature.

Frequently asked questions about 3 Wonders Mystic Howl

When was 3 Wonders Mystic Howl released?

3 Wonders Mystic Howl was released on 11 September 2026.

Who developed 3 Wonders Mystic Howl?

3 Wonders Mystic Howl was developed by Boomerang Studios and released via the Yggdrasil GATI platform.

What is the RTP?

The version available at Oranje Palace has an RTP of 94%.

What is the maximum win?

The maximum win is 3,198× the stake.

How is Hold & Respin triggered?

One or more Scatter symbols can trigger the 3 Wonders Hold & Respin feature.

How many respins do you get?

The feature starts with 3 respins. MORE SPINS can add extra respins to the starting amount.

What does MULTI do?

MULTI is activated by green moon Scatters. Each triggering green Scatter increases the Total Multiplier, and new Coin prizes during the feature are multiplied by this value as soon as they land.

What does MORE SPINS do?

MORE SPINS is activated by pink moon Scatters. Each triggering pink Scatter adds extra respins to the initial amount.

What does COLLECT do?

COLLECT is activated by blue moon Scatters. Each triggering blue Scatter adds a Collector symbol that collects new Coin prizes during the bonus.

How high can Coin prizes go?

Coin symbols can carry values of up to 200× the total bet.

What happens when the bonus grid is completely filled?

If all positions are filled, the Hold & Respin feature ends immediately and all accumulated prizes are doubled.

About this review

This review has been prepared using the official product specifications provided by Boomerang Studios together with an editorial assessment of the gameplay. The game features, bonus mechanics and technical information are based on the information available at the time of the game's release.

Oranje Palace publishes this review as a licensed online casino in the Netherlands. Oranje Palace is operated by Holland Gaming Technology Ltd. under licence number 1631/01.272.522, issued by the Dutch Gaming Authority (Kansspelautoriteit, Ksa).

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