In this dense article, which is full of simple and composed adjectives and adverbs you will find interesting words and expressions for C1 students like: "[a] suspenseful, action-filled [film], wiliness, the film's themes [...] resonate profoundly with social justice movements today, to feature, damsels in distress, [a] dreamlike film, a callow knight, to behead, to stroll, to gasp, bewildering, a smart-mouthed comic sidekick, swirl, stunningly shot, to blur the boundaries between fact and fiction, to reel back, to capture [the novel's] nuance, an entrancing work of art, over-the-top entertainment, giddy, to mess up, a spellbinding drama, endless grievances and yearnings, grief, barrage, bone-crunching violence, grip, to boast, strait-laced, brooding, creepy, sprightly, chilling, a grief-racked, a pared-down drama, a stunner, haunting, a heart-wrenching scenario, a run-down prison, griots, roaming free, to veer into myth, chatty, a heart-rending film, a visually dazzling film, the film is loosely based, from defiant pride to pleading to resilience, a glamourous vermilion gown, outrageous, an uproarious celebration, a piquant warning, subtlety".
If you prefer to hear the flow of oral English, you can listen to NPR's list of the 10 Best Movies of 2021 which includes Almodovar's "Parallel Mothers". The audio comes with a script, which can be helpful for C1 students.