FFF 27: Epic Combo

Fancy Fillomino February: This is a series of 28 (twenty-eight) 7×7 Fillomino puzzles over the February. Every 00.00 UTC+7 a new puzzle will be up. The basic Fillomino rules apply unless otherwise indicated.

Extra Region Fillomino In addition to the regular Fillomino rules, the green cells form a 4×4 grid that is also a valid Fillomino grid.

Difficulty 3.5/10 Master target 1:30 Expert target 2:30

FFF27: Epic Combo
Extra Region Fillomino

So, how can Sky mesh two puzzles in one grid and one rule? Well, besides a pretty common Samurai variation, this is also possible.
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