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Bob De Quatre

review Review: 70321 General Magmar's Siege Machine of Doom

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Since the theme came out last year, I wanted to do a Nexo Knight set review. And here it is! I choose set 70321 General Magmar's Siege Machine of Doom because it was the set that got the longest name, and so I knew I'd like it! More seriously, the minifigs looked great and the Siege Machine of Doom looked quite scary. Let's see if it's really the case!


Set information

Set Name: General Magmar's Siege Machine of Doom

Set Number: 70321

Number of Pieces: 516

Theme: Nexo Knights

Year Release: 06/2016

Prices: £39.99 / $49.99 / €49.99 (Euro prices may vary)

#70321 on Brickset

#70321 on Rebrickable



Lift the back of General Magmar's 2-in-1 Siege Machine of Doom, featuring 2 platforms and giant wheels with spikes, to switch the vehicle into siege mode. Fire the dual catapults and disc shooter to knock Clay Moorington off his Hover Horse. Use the swords to play out battles on the ground as General Magmar and Flama take on Clay with his Claymore sword for the Book of Destruction. Comes with 3 scannable shields and 3 minifigures.

  • Includes 3 minifigures: General Magmar, Flama and Clay Moorington.
  • General Magmar's Siege Machine of Doom features 6 large wheels with translucent- red flame elements and spikes, monster teeth, cockpits for General Magmar and Flama, dual catapults and a disc shooter.
  • The Siege Machine of Doom's 2 catapults and disc shooter can be fired in both vehicle mode and siege machine mode.
  • Weapons include General Magmar's sword, Flama's fiery sword and Clay's Claymore sword.
  • Accessory elements include the Book of Destruction, General Magmar's cape, Flama's fire helmet, Clay's helmet, shield and NEXO Armor, 4 Globlin balls and 3 Globlin discs.
  • This set offers an age-appropriate building experience for ages 8-14.
  • Download the free LEGO® NEXO KNIGHTS™: MERLOK 2.0 app to your smartphone or tablet. Ask your parents' or guardians' permission before going online.
  • Scan shields for each of the 3 NEXO Powers (Giant Growth, Storm Dragon and Dynamighty) and power up in the LEGO® NEXOKNIGHTS™ game!
  • Watch all your favorite NEXO KNIGHTS™ characters on Cartoon Network.
  • General Magmar's Siege Machine of Doom measures over 5” (14cm) high, 6” (17cm) long and 8” (21cm) wide in vehicle mode, and over 9” (24cm) high, 6” (17cm) long and 8” (21cm) wide in siege mode.
  • The Hover Horse measures over 1” (4cm) high, 3” (9cm) long and 1” (5cm) wide.



The front shows the usual 2016 Nexo Knight theme, with the 3 minifigures included (Clay, Flama and General Magmar) and the 3 Nexo Power also included.


The back of the box shows the set's play features of the Siege Machine of Doom. There's also a relatively big artwork trying to make us play the free game.



Content of the box

The box contains 4 numbered bags, two instruction booklets, a loose stickers sheet and six of these big spiked wheels.



The stickers look really great, but I feel like they're too much of them... 



Instructions booklet

As it seems to be the norm now with medium sized sets, we got 2 instruction booklets. The smaller one, which will gide us through the first part of the build has 79 pages, while the second has 64 pages. A total of 143 steps awaits us...


Instructions are clear and easy to follow. The light blue background makes color distinctions easy.


Bill of materials...


Lots of promotional pages at the end of both booklet.




The set contains 3 minifigures: Clay, Flama and General Magmar, the last two being exclusive to this set. Clay got a dual printed face while both Magmar and Flama got back printed heads. I'm really fond of the different prints on Magmar and Flama. They look really menacing!




With bag #1 we'll start building the Siege Machine...


... and get the complete Hover Horse in Clay's colors. It is built like every other Hover Horses that can be found in other sets.



Bag #2 adds to the Siege Machine, with the beginning of the lifting mechanism.



With Bag #3 the Siege Machine is almost complete.



Ang bag #4 and the loose wheels finish it!



A few spare parts...



The complete set with the Siege Machine of Doom and Clay on its Hover Horse. The fight seems a bit unfair!...
The build is rather interesting. Lots of Lego Technic beams and connectors in there. Lots of stickers too, but they really add to the beauty of the Siege Machine of Doom!



Play features

The main play feature is the ability of the Siege Machine to raise. In that position, it looks like a big monster with an open mouth. You can note that the three plateforms stay horizontal in both configuration. In lowered position, don't play with the disk shooter, as you could hit Flama in the head!


In raised mode, we have acces to a prison cell hidden in the Siege Machine guts. You don't want to be in there when in lowered mode!


The sets comes with the usual shooting thingies for a bad guys sided Nexo Knight set: nice printed 2x2 round plates and balls. We also got two Nexo Powers in addition to the one on Clay's shield, and the Book of Destruction! 




Design: 9/10 - The Siege Machine is quite impressive in its design! The mechanism works extremely well!

Parts: 8/10 - A very nice selection of parts with lots of colors. Again less stickers and more printed parts would be better.

Build: 8/10 - Not very difficult builds, but rather interesting.

Playability: 8/10 - A great playset !

Minifigs: 9/10 - While Clay's minifig is quite standard, General Magmar and Flama are absolutely stunning!.

Price: 7/10 - With decent ppp of 0,097€ and 3 minifigs, this set's price is correct.

Overall: 49/60 (82%) - General Magmar's Siege Machine of Doom is a great set. Not only does it have (2) great minifigures, but it is also very playable and looks nice, with a good selection of parts.

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Great review of a great set! One thing I didn't see you mention is the clever method of using an angled tile to allow the disks it shoots horizontally to "skip" over the front of the vehicle when in the lowered position (though, as you mention, the front occupant might get in the way depending on how you have them positioned)

One of the main things I love about this set is the sort of symmetry it has with Axl's Tower Carrier (which is very similar in size and structure to this vehicle in lowered position). It really helps the two feel like they belong to the same universe despite their vastly different aesthetics and functionality.

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What a good review of strange set. I like you added enough pictures and not too much text.

I was asked to build alternative model out of this set so I played with it little bit. I liked the way of changing direction of shot disks Lyichir mentioned above. I was bit disappointed by sort of bricks in this set - it was not easy to build this truck out of them.


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Thanks guys.

To be honest, I never fired the disk shooter, I don't like those shooters TLG puts everywhere, and I also don't like to search the whole room for a 2x2 disk :blush:

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