UnlimitedStealthy

(there's only one file for version 1.21.8, but it's supposed to work for other versions 1.21+, there's nothing too version oriented except for the windcharge based mechanic)

This plugin gives u an opportunity to become a stealthy and destructive ninja. So if u have it installed on your server, just don't tell your friends about it)

The plugin grants special abilities to some OG Minecraft items:

Gunpowder when held in main hand: launches windcharges when rightclicked

Nehter star (supposedly a schuriken) when held in main hand: launches arrows with the speed of a machine gun when rightclicked

Sugar when in main hand: leaves a snow trail (supposedly to lure your enemies into deadly traps) when rightclicked

Additionaly, players get special ninja abilities now:

You can get free invis effect by shifting (crouching).

You leave a trail of blocks behind when u toggle sprint (supposedly to barricade the way for people following u)

From now on crossbow becomes a super weapon. If u rightclick it, it will launch fireballs. 

Good luck on your first sneaky mission