Boss file · Mechanical Snowfield city, Snow-3-B

Sinan Kin

The magnetic family member left in lament.

Remaining memories of relatives

I am inscribed in the snowy technology

Lore

Sinan Kin is the miniboss of Mechanical Snowfield. At the end of the battle, he remembers. Once again, he has returned to that time — that time in Mechanical Snowfield. There is some deviation from what he imagined, but it seems to be complete.

He drives in from off-screen in a magnet truck, and the battle feels like arranging a large wall of metal heads. The name sounds like family, the mechanics sound like magnetic engineering, and the lines sound like a remaining memory. Mechanical Snowfield's magnetic technology is sometimes romantic, and sometimes it simply blocks you with a whole row of metal.

Mechanics

Role

Area miniboss · Metal-head barrier and bestowal

Drives in from the right at the start and performs two barrier actions first.
Barrier: creates a row of metal heads to block projectiles.
Bestowal: gives unbroken metal heads to Basic Zombies or damaged Metal-head Zombies, turning them into Metal-head Zombies while preserving armor damage.
Sniping: when Lightning Reed's stacked damage reaches the threshold, fires a metal head to directly kill Lightning Reed.
Magnet-shroom can absorb Sinan Kin's metal heads. Lorus, Potato Mine, and other area-control setups can also form a stable defense.

Advanced mechanics

Sinan Kin combines HP gates, metal-head barriers, bestowal repair, and guarded damage windows into one magnetic defense. If the player only tunnels the boss, metal layers keep turning ordinary bodies back into serious threats; if the metal interface is dismantled first, the fight becomes much more stable.

HP gates and action tempo

The main-story form scales maximum HP linearly by difficulty: Hmax = 2000(d + 5), where d is the difficulty index from Easy to Unbalanced. Some challenge contexts add another 5000 HP; m in the formula marks whether that reinforcement is active. The normal fight is still defined more by gates than by the total number.

The first gate appears after roughly 1000 HP has been lost. Later major gates sit near 80%, 60%, 30%, and 10% of maximum HP. A gate does not end the battle by itself; it opens a metal-head or magnetic action window, with higher difficulty shortening the recovery interval.

H_{\max}=2000(d+5)+5000m,\qquad H\le\{H_{\max}-1000,0.8H_{\max},0.6H_{\max},0.3H_{\max},0.1H_{\max}\}

Cross the HP gate first, then resolve the metal-head action; high difficulty leaves less adjustment time.

Metal-head barrier and bestowal

The barrier is not just an ordinary row of walking zombies. It first places metal heads as armor layers that can later be bestowed. An intact metal head can be attached to a Basic body; a damaged metal layer keeps its damage when bestowed, so the move is closer to transferring existing armor than refreshing a new layer.

When bestowal reaches a damaged Metal-head Zombie, the armor is restored into a usable threat and sent back into the advance. The player should read the metal layer and the body layer separately: break or absorb the metal first, then solve the ordinary body or whatever body pressure remains.

\text{Metal-head Zombie}=\text{body}_{270\text{ HP}}+\text{metal layer}_{\text{damage retained}}

The metal layer keeps its damage and resolves separately from the body; clearing metal and clearing the body are different jobs.

Reduction windows and counter interfaces

During metal-head actions, or while magnetic constructs are still tying up the field, Sinan Kin enters a guarded damage-reduction state. A positive hit first loses about 80% of its damage and only the remainder is applied. Small hits still count, but dumping burst damage into this window is inefficient.

Lightning Reed can keep landing chained damage on the boss, but once its stacked damage reaches the threshold, Sinan Kin answers by sniping Lightning Reed with a metal head. Magnet-shroom attacks the system from the opposite direction: it can absorb metal heads or metal projectiles, lowering the value of both barriers and snipes.

D_{\text{applied}}=D-\left\lfloor0.8D\right\rfloor\ge1\qquad(\text{guard window})

Lightning Reed provides sustained pursuit but can trigger a snipe; Magnet-shroom directly weakens the metal interface.

Interactions & counters

Magnet-shroomCan absorb metal heads and reduce shield/grant pressure.
Lightning ReedHigh stacked damage triggers the metal-head snipe.
Potato MinePath freezing and crowd control help stabilize the defense.