This piece by Ryan Garber utilizes a somber harmonic language to explore themes of interior struggle and release. It is distinguished by its dense, chordal texture and restrained, emotional intensity.
The primary challenge is balancing the voicing within the dense chordal textures to highlight the primary melody.
Comparable difficulty and character — good candidates for what to learn next.
'Mercy, not Sacrifice' is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 'Mercy, not Sacrifice' lasts about 3 minutes.
'Mercy, not Sacrifice' is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Ballade by Josef Gabriel Rheinberger, Cammino Funebre No.5 in F minor by Marco Anzoletti, Cammino Funebre No.3 in E-flat minor by Marco Anzoletti — see the full similar-pieces list on this page.