[Hakko]

Ivy Kings get 4 vine ogres/summoning at a cost of 1N per spell. That's pretty good economics after a few turns. 20 vine ogres is a very nice meat shield. Twenty ogres in five turns for 25N (20N for Ivy King plus 5 for the ogres) vs. 20 turns for 20N (assuming one caster and no ivy crown) is a pretty good tradeoff.