Trinity Heights arcReginald solo then Trinity Council three-member at Trinity Castle
Trinity Heights is the second Chapter 5 zone and gates access to Trinity Castle via Reginald as the solo miniboss, then the three-member Trinity Council as the chapter mid-boss. The verified Miraheze council roster is Reginald (HP 40, DEF 2, attributes Spiky + Double Turns, moveset Quick Axe -> Call for Help -> Axe Charge -> Axe Spin -> Axe Strike -> Hero Potion), Robur (HP 25, DEF 1, attribute Item-Resistant, moveset Strike -> Swipe -> Sky Chop Deluxe -> Frenzy -> Robur Buff -> Double Trouble -> Peril by Thousand Cuts), and Azuri (HP 30, attributes Item-Resistant + Mobile, moveset Astral Chargeup -> Double Staff -> Fireball -> Staff Combo -> Spin Dive -> Azure Blast), with combined council HP 95 across the three members. The reliable Trinity Council counter is the Robur-first focus (Item-Resistant stops item-heal economy, his 25 HP is the lowest in the council), burn Azuri before Azure Blast lands, then collapse Reginald with one shield card on Hero Potion. Item-Resistant on Robur and Azuri means card-driven damage is mandatory - consumable routes (Mushroom, Pizza, item-burst) underperform against the council specifically.
Seventh Sanctum arcFrostmaw with Shield stat and the keep-Cassie-alive mechanic
The Seventh Sanctum is the third Chapter 5 zone and gates the chapter final boss as Frostmaw at Trinity Castle. Frostmaw is the first Block Tales boss with the Shield stat (cyan diamond icon) and the only main campaign fight where Windforce Cassie dying ends the run outright. The fight has a fire weakness that lets fire cards and the Ice Dagger carry value (Ice Dagger also doubles as a self-heal during long phases), ice terrain that punishes sloppy positioning by slowing movement, and a Shield-break requirement that makes def-pierce cards like Slingshot + Knight + Aggressor more efficient than raw damage. The reliable Frostmaw shell treats Cassie as the top priority over damage output - plan the deck so Cassie's survival is the win condition, not the boss HP race, and slot at least one Fire card and one Shield-break card before entering the Seventh Sanctum.
Mutant superbossOptional Manor superboss with Brigand's Sword gate and HP 100 Double Turns
Mutant is the Chapter 5 optional superboss, gated behind The Manor entrance and reachable only after obtaining the Brigand's Sword. Miraheze lists Mutant with HP 100, Double Turns attribute, and encounter location The Manor, with item drops that include Bloxy Cola (11.1%), Mr Batty (2.7%), Applesauce (2.6%), Glue (1.5%), Slateskin Potion (1.2%), Cherry Bomb (1.1%), Orange Juice (0.7%), and Pie (further down the table). The Double Turns attribute doubles Mutant's action economy the same way Opticus's does, but Mutant's HP 100 ceiling is much lower than Opticus's HP 600 - the fight is tuned as a fast burst-check rather than a sustained survival test. Mutant is not required for the chapter clear, but the Brigand's Sword gate makes it the natural follow-up for players who already cleared the Frostmaw finale and want the Chapter 5 badge list closed out.
Pit rematchDemo 5's expanded Pit stacks Trinity Council + Toothy Deer on Floor 59
In Demo 5's expanded Pit of 100 Trials, the Chapter 5 rematch lineup is the Trinity Council paired with Toothy Deer on Floor 59 as a stacked council-then-Pit-exclusive back-to-back. The Floor 59 Trinity Council uses the same Reginald + Robur + Azuri HP 95 stat block as the chapter fight but with tighter Robur Buff + Azure Blast timing windows and a forced Fighter + Mage + Mage party composition that you cannot swap out. The Toothy Deer half of Floor 59 uses the Staff-Bash-positioning shell with the Brigand's Sword card drop locked to the council-half clear, so the Floor 59 plan needs the council shell AND the Toothy Deer shell in the same deck rotation. The Floor 59 pair is the single best farming route for the Chapter 5 Nirvana badge variants, and the Floor 59 pairing is what pulls 'trinity council pit' / 'toothy deer pit' Reddit threads from players running the full 60-floor Pit completion.
Badge routePaintball Gun unlock, Trinity Council Nirvana, Frostmaw solo shield, and Mutant side reward all live here
Chapter 5 carries four badge families that anchor search traffic. The Paintball Gun unlock is tied to the Opticus survival challenge completion - the card is granted on chapter-clear, not on chapter-start, so the badge run cannot start until the Wizard's Tower encounter resolves. The Trinity Council Nirvana badge is tied to the Robur-first focus (the badge requires Robur to be the first council member killed, then Azuri, then Reginald - the order matters and a Reginald-first attempt invalidates the badge). The Frostmaw solo-shield badge is tied to keeping Cassie alive through the entire fight with no revives used - the badge run needs two self-heal cards and one shield card stacked for the second wind. The Mutant side reward is tied to the Brigand's Sword being in the inventory at the moment of the kill (same pattern as Chapter 4's Sacred Hollow badge), so the badge cannot start until The Manor entrance is reachable. The full Chapter 5 badge list (5 bosses + 4 Nirvana badges + Mutant side reward + Paintball Gun unlock) is what pulls the steady 'chapter 5 block tales' search traffic every Demo 5 patch.
Build shellOne deck that survives the Opticus + Council + Frostmaw arc without re-speccing
The reliable Chapter 5 shell is one multi-target burst card (to handle Opticus's Double Turns action economy and to chip the Trinity Council's three-member cycle), two healing cards (Opticus, the Council, and Frostmaw each have at least one phase that punishes under-healed parties, and Cassie's survival is the Frostmaw win condition), one dispel or shield card (to absorb Frostmaw's Shield stat phase and to handle the Opticus Ultimate Overseer self-damage tell), one fire card (Frostmaw is the only main-campaign fire-weak boss, so the slot is non-negotiable), and one item-bypass card or shield-break card (Trinity Council's Robur + Azuri Item-Resistant attributes mean consumable routes underperform, so card-driven damage is mandatory). Solo players should swap one heal for a self-revive - the Frostmaw second wind rewards mitigation over recovery, and a single self-revive on the Shield-break phase is the difference between a clean Chapter 5 clear and a re-run. Use the build maker to confirm BP, SP, fire coverage, shield-break, and party-role coverage before entering the Wizard's Tower or attempting Pit Floor 59.
