Cathedral 9 slot review
Provider: ELK Studios
Mechanics: Feature Reel · Mystery Coffin · Entombed · Holy Collect · Global Multiplier · X-iter™ · Free Drops
Volatility: ░░░░█ High
RTP: 94.00% ⚠️ below market average
Max Win: 25,000× bet
In the heart of Cathedral 9 lie nine ancient artefacts. Each one unlocks a path to forbidden coffins overflowing with treasure. Collect them all and the cathedral awakens. The backdrop is a dark Gothic interior with stained glass, stone columns and the atmosphere of concealed sacred power.
The 6×5 grid uses a scatter pay system — wins don't require paylines, just 3 or more matching symbols anywhere on the grid. Above the main grid sits the Feature Reel (2 rows) which drops feature symbols down into the main field. The Mystery Coffin descends to the bottom row and when activated converts all visible coffins into one symbol and adds its multiplier to the global pool.
The progression system is Holy Collect. Holy Blockers accumulate between rounds and when triggered add 3–6 coffins to the grid. Entombed covers the entire Feature Reel with one symbol and converts all main grid positions to that symbol. The Global Multiplier applies to all wins.
6×5 grid, scatter pay. Feature Reel 2×6 above the main grid. X-iter™ with 5 modes.
🏛️ Feature Reel — 2×6 top section; holds feature symbols and empty cells; symbols drop into the main grid and activate
⚰️ Mystery Coffin — descends to the bottom row; activates to reveal all visible coffins as one symbol; Super Mystery Coffin adds a multiplier to the global total
🕯️ Entombed — symbol covers the entire Feature Reel; all main grid positions convert to that symbol — guaranteed matches
🏺 Holy Collect — accumulates Holy Blockers between rounds; triggers by adding 3–6 coffins to the grid; state persists between spins
✖️ Global Multiplier — built from Super Mystery Coffins; applies to all wins in the round
🎰 X-iter™ — 5 modes: from 2.5× (3× bonus trigger chance) to 500× (Super Bonus with Super Mystery Coffins)
In the base game, Holy Collect builds gradually across spins — triggering it mid-chain can add coffins at exactly the right moment. Entombed guarantees full-grid matches.
Bonus — 3+ bonus symbols award Free Drops; each symbol gives 2–4 drops; additional bonus symbols add more drops; Super Bonus = winning on all 9 symbol types triggers a mode with only Super Mystery Coffins
X-iter™ — modes:
— 2.5× — Bonus Hunt with 3× trigger chance
— 10× — Mega Bonus Hunt
— 50× — Mega Hunt
— 100× — Bonus
— 500× — Super Bonus
✅ Holy Collect persists between rounds — progression is felt across the entire session
✅ Entombed guarantees full-screen matches — one of the most visually dramatic moments in ELK's lineup
✅ 25,000× potential with scatter pay — an enormous ceiling
❌ RTP 94.00% ⚠️ — below market average and below most ELK slots
❌ More overlapping systems than any other ELK slot — the steepest learning curve in the catalogue
❌ Global multiplier builds slowly without Super Mystery Coffins
Cathedral 9 is a slot where coffins open one by one, the multiplier grows across rounds, and everything builds toward one moment — when the cathedral finally wakes.
Mechanics: Feature Reel · Mystery Coffin · Entombed · Holy Collect · Global Multiplier · X-iter™ · Free Drops
Volatility: ░░░░█ High
RTP: 94.00% ⚠️ below market average
Max Win: 25,000× bet
In the heart of Cathedral 9 lie nine ancient artefacts. Each one unlocks a path to forbidden coffins overflowing with treasure. Collect them all and the cathedral awakens. The backdrop is a dark Gothic interior with stained glass, stone columns and the atmosphere of concealed sacred power.
The 6×5 grid uses a scatter pay system — wins don't require paylines, just 3 or more matching symbols anywhere on the grid. Above the main grid sits the Feature Reel (2 rows) which drops feature symbols down into the main field. The Mystery Coffin descends to the bottom row and when activated converts all visible coffins into one symbol and adds its multiplier to the global pool.
The progression system is Holy Collect. Holy Blockers accumulate between rounds and when triggered add 3–6 coffins to the grid. Entombed covers the entire Feature Reel with one symbol and converts all main grid positions to that symbol. The Global Multiplier applies to all wins.
6×5 grid, scatter pay. Feature Reel 2×6 above the main grid. X-iter™ with 5 modes.
🏛️ Feature Reel — 2×6 top section; holds feature symbols and empty cells; symbols drop into the main grid and activate
⚰️ Mystery Coffin — descends to the bottom row; activates to reveal all visible coffins as one symbol; Super Mystery Coffin adds a multiplier to the global total
🕯️ Entombed — symbol covers the entire Feature Reel; all main grid positions convert to that symbol — guaranteed matches
🏺 Holy Collect — accumulates Holy Blockers between rounds; triggers by adding 3–6 coffins to the grid; state persists between spins
✖️ Global Multiplier — built from Super Mystery Coffins; applies to all wins in the round
🎰 X-iter™ — 5 modes: from 2.5× (3× bonus trigger chance) to 500× (Super Bonus with Super Mystery Coffins)
In the base game, Holy Collect builds gradually across spins — triggering it mid-chain can add coffins at exactly the right moment. Entombed guarantees full-grid matches.
Bonus — 3+ bonus symbols award Free Drops; each symbol gives 2–4 drops; additional bonus symbols add more drops; Super Bonus = winning on all 9 symbol types triggers a mode with only Super Mystery Coffins
X-iter™ — modes:
— 2.5× — Bonus Hunt with 3× trigger chance
— 10× — Mega Bonus Hunt
— 50× — Mega Hunt
— 100× — Bonus
— 500× — Super Bonus
✅ Holy Collect persists between rounds — progression is felt across the entire session
✅ Entombed guarantees full-screen matches — one of the most visually dramatic moments in ELK's lineup
✅ 25,000× potential with scatter pay — an enormous ceiling
❌ RTP 94.00% ⚠️ — below market average and below most ELK slots
❌ More overlapping systems than any other ELK slot — the steepest learning curve in the catalogue
❌ Global multiplier builds slowly without Super Mystery Coffins
Cathedral 9 is a slot where coffins open one by one, the multiplier grows across rounds, and everything builds toward one moment — when the cathedral finally wakes.
