Vastu Vinimaya

Vastu Vinimaya Plugin (Minecraft Paper 1.21.11)
This plugin adds a custom villager trader called Vastu Vinimaya. When you place a diamond block near a jobless villager, it converts into this special trader (Leatherworker) with unique, high-value trades.

The villager sells useful PvP and survival items like:

Gold (in exchange for emeralds)
Splash potions (Speed I & II, Strength II)
Splash Turtle Master potions (different strengths/durations)
Enchanted Golden Apples
Blaze rods

It also adds a crafting recipe for cobwebs using string in an “X” shape.

To keep things balanced, each Vastu Vinimaya villager only lasts for 1 hour, after which it disappears, so players need to find or breed new villagers to use the trades again.