This category is for the Synthetic Sphire Beasts (スフィア合成獣 Sufia Gōsei-Jū) that the Sphires created by assimilating organic substances or other life forms in Ultraman Dyna. Their common ability revolves around energy beam and subspace barrier. Several of them can evolve into Super Synthetic Beasts (超合成獣 Chō Gōsei-Jū), gaining enhanced powers and abilities.

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