For Hero Factory invasion from below's 5 year anniversary and the theme as a whole's near 10 year one, I decided to make 3 battle machines out of spare CCBS parts that
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SURGE & ROCKA Combat Machine : Set 44028-1 | BrickLink
ArtStation - LEGO Hero Factory - Invasion From Below
LEGO HERO FACTORY 44015 EVO WALKER INVASION FROM BELOW 51 PIECES NEW UNOPENED 673419207096 | eBay
LEGO HERO Factory Invasion From Below | Brickset
JANGBRiCKS LEGO reviews & MOCs: LEGO Hero Factory Invasion from Below Wave 2 is here!