every 20 minutes:
spawn 1 zombie at location(0, 0, 0)
set {_a} to last spawned zombie
spawn 1 zombie at location(2, 0, 2)
set {_b} to last spawned zombie
spawn 1 zombie at location(5, 0, 5)
set {_c} to last spawned zombie
set name of {_a} to "&aMega Zombie"
set name of {_b} to "&aMega Zombie"
set name of {_c} to "&aMega Zombie"
wait 5 minutes
loop all zombies:
if name of loop-entity is "&aMega Zombie":
kill loop-entity
on death of a zombie:
if name of event-entity is "&aMega Zombie":
drop dirt with lore "Super Dirt" at the location of the event-entity