Sculk Echo

New — The End answers the call

• The Whisperer (Infected Enderman) — a tall silhouette cracked with sculk veins. In darkness only two teal eyes burn. It teleports in bursts of sculk souls and sometimes leaves a block of sculk where it jumped. Kills the hunter's best sense: within 16 blocks your Echo Pulse jams with phantom noise (+35% interference), and in echo-vision its silhouette flickers in and out between pulses. Drops 1–2 echo shards.
• Sculk Shulker — a living turret with a sculk vortex for a heart. Its bullets deal damage AND inject the disease: +3 infection per hit on a player (watch the HUD bar grow). A bullet that strikes a block may seed a sculk vein on it — the epidemic now spreads across architecture, not just flesh.
• Both join the epidemic: they hunt everything that is not yet one of them, never despawn, and can be created by conversion (melee, arrows, creeper cloud, sculk eggs).

Merchant & QoL

• Sculk Merchant now rolls a random stock on spawn: 2 fixed shard trades plus 3–4 random offers (diamond, potion, golden apple, sculk catalyst, XP bottles, ender pearls, sculk blocks, netherite scrap) with floating prices.
• New button in the trading GUI: "New goods: 1 shard" — pay one echo shard and the merchant rustles the sculk and reshuffles his stock on the spot.
• New advancement: "Universal Friendship" — complete a trade with the Sculk Merchant. Vanilla villagers don't count: this friendship is earned in the Deep Dark.

Fixes

• Trading GUI reroll button moved inside the window, next to the inventory label.
• Infected Enderman eyes render as a separate additive glow layer (body stays dark).

Known issues & roadmap

• Sculk Mite (swarming burrower) is drawn but not released yet — next beta.
• Gradual blindness over in-game days and Echo Stimulator crafting remain on the roadmap.

The sculk does not kill. The sculk recruits. Now it recruits across dimensions.