وَمِزَاجُهُۥ مِن تَسْنِيمٍ
Sentence structure
This nominal clause is coordinated with خِتَـٰمُهُۥ مِسْكٌ. مِزَاجُهُۥ is the topic and مِن تَسْنِيمٍ is linked to its omitted predicate.
Ayah summary
That pure drink will be blended with Tasnim.
وَمِزَاجُهُۥ — And its mixture
Grammar: وَ coordinates the nominal clause. مِزَاجُ is a nominative topic and attached هُۥ its genitive possessor.
مِن — (is) of
Grammar: a preposition functioning as the linked complement.
تَسْنِيمٍ — Tasneem
Grammar: An indefinite genitive noun governed by مِن; the phrase is linked to the omitted predicate of مِزَاجُهُۥ.