Natanael Mojica provides a powerful, high-contrast fantasy that makes use of wide keyboard registers. It is distinguished by its intense, almost cinematic quality.
At Henle 5 this is a late-intermediate piece — technically substantial, with musical demands to match. The main demands: big chords that need weight without harshness; sharp dynamic and character contrasts held together in one arc; and sweeping arpeggio figures that must stay smooth across positions.
Focus on the precise placement and sonority of the large chords within the dramatic passages.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Fantasia is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 Fantasia lasts about 5 minutes.
Fantasia 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 Allegro barbaro, Sz.49 by Béla Bartók, Dance of the Wild Men by Roy Agnew, Alleluia by Charles-Valentin Alkan — see the full similar-pieces list on this page.