This plugin allows you to modify a mobspawner and the outcoming monsters just by adding a sign to it. This way you can create dungeons or complete individual games just with redstone on a server.

Features (Everything configurable for each mobspawner)

Trigger Mobspawn Event by placing a redstonetorch below the mobspawner
Disable the mobspawner by adding a redstone signal to it
Modify Health of the Spawned Mobs
Give the Mob invulnerability after spawning
Set spawned mob on fire
Set Items which the mob will drop on death
Deactivate Item/XP Drop
Set the damage the mob deals out on players
Limit spawnamount to a maximum amount of mobs
Give the mob weapons
Give the mob armor
Spawn multiple mobs at the time
Spawn mob on a different place
Teleport mob after spawn

How does it work: Just create a mobspawner and put a sign on top of it. You can add up to 3 signs (always on top of the other). Each Line on the sign contains a command. For Ex:

h30
f10
d5:1
nexp

will give the mob 15 hearts (30 hp), will set it on fire for 10 ticks, will drop a 5:1 on death and no exp

Commands are given by Flags which must be 1st of the line on the sign Allowed Flags:

h - Health in hp
i - invulnerability in ticks
f - ignite in ticks
d - drop item. can be added multiple times. ex: d5:1 drops wood (subid 1)
n - disallow drop. possible: nexp, nitem, nall - no EXP, no Items, nothing at all
s - damage the mob deals with each hit
m - max amount of mobs nearby
w - weapon in hand of mob - can be diamond, gold, iron, stone, wood, bow, rod
r - armor - can be diamond, gold, iron, leather, chain
a - spawn mob mulitple times
t - teleport mob after spawn (x,y,z)
l - spawn mob on another location (x,y,z)

Permissions:

bt.red - can use it

RedMobSpawn