Brüder, schrecklich brennt die Träne is a poignant, operatic-style piano arrangement by Schubert that emphasizes dramatic vocal lines. It is noted for its intense harmonic language and Schubertian depth.
Project the vocal line clearly above the complex, shifting accompaniment.
Brüder, schrecklich brennt die Träne (D.535) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Brüder, schrecklich brennt die Träne (D.535) lasts about 7 minutes.
Brüder, schrecklich brennt die Träne (D.535) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.