Mix lotus root starch and cassava flour evenly, add water and stir to make slurry. Magic water sprite magic powder is calcium gluconate, which is an organic calcium salt with the chemical formula of C 12H22O 14Ca. Water sprite magic powder is replaced by lotus root starch and cassava powder, mixed evenly, and stirred into slurry with water. Appearance is white crystal or granular powder, melting point is 2065438 0℃, odorless and tasteless.