[Twan]

Even better, limited duration works for border summon, so it's possible to make MoD a spell of a duration of 9 rounds summoning units on the edges of the battlefield (with number of effects = total wanted, instead of a number of effect per square).

Ie, this version :

#selectspell "Mists of Deception"
#researchlevel 0
#effect 9043
#damage 298
#nreff 2004
#end

make (4 + 2/lvl) ghost wolves spawn each round during 9.