Gene Modification

Gene Modification is a feature in the Chinese version of Plants vs. Zombies 2. On December 2nd, Pop Cap Shanghai showed the new way to get Puzzle Pieces: Gene Modification. It was release with the v1.9.1 update in Android, and v2.0.0 in iOS.

You can put 2~5 puzzle pieces in to the interface shown below, and spend 5000 coins (or 20 gems) to create a new puzzle piece. The plant of the new puzzle piece is uncertain, but the rarity is shown above the "Create" button.

2 puzzle pieces (same rarity) will create a puzzle piece with a plant with the same rarity.

For example, 2 Electric Blueberry Puzzle Pieces will 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.

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.

Gallery
(Note: The screenshot is shown in the sneak peek, but the cost is lowered after the release)