Gene Modification is a feature in the Chinese version of Plants vs. Zombies 2. On December 2nd, PopCap Shanghai showed the new way to get Puzzle Pieces - Gene Modification. It was released with the v1.9.1 update in Android, and v2.0.0 in iOS.
The player can put 2~5 puzzle pieces in to the interface shown below, and spend 5000 coins (or 20 gems: which increases the chance to create to create a puzzle piece with higher rarity) to create a new puzzle piece. The plant of the new puzzle piece is uncertain, but the rarity is shown above the "Create" button.
Results of Creation
- 2 puzzle pieces (same rarity) will create a puzzle piece with a plant with the same rarity. For example, 2 Electric Blueberry Puzzle Pieces may create a Coconut Cannon Puzzle Piece, but will not create a Snapdragon Puzzle Piece or a Laser Bean Puzzle Piece.
- 3 puzzle pieces (same rarity) will have a 50% chance to create a puzzle piece with a plant of higher rarity.(And the other 50% will create a puzzle piece with another plant of the same rarity)
- 4 puzzle pieces (same rarity) will have a higher chance of creating a puzzle piece with a plant of higher rarity(67%)
- 5 puzzle pieces (same rarity) will create a puzzle piece with a plant of higher rarity. (Example 1: 5 Horsebean Puzzle Pieces will may create a Cattail Puzzle Piece; Example 2: 5 Peashooter Puzzle Pieces may create a Sap-fling Puzzle Piece but also has a chance to create Spore-shroom Puzzle Piece)
Note is that although this might be the only way to get Legendary-rarity puzzle pieces and to make use of the unused puzzle pieces (such as Gold Leaf), this function is very coin consuming.