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And it's not just Efreet, but also Cerberuses and, of course, Devils.
And if we're talking about comparison, building an Inferno Castle is easier than a Knight's Castle, especially since building Devils is twice as cheap as building Angels!!!
As for the advantages of water magic over fire magic, that's a debatable point. And the opinion that there's nothing but Armageddon in fire magic is nonsense.
In fire magic, the key spells are:
1) Curse, the counterpart to Blessing
2) Bloodlust, similar to Blessing
3) Blindness (allows you to attack without retaliation)
4) Berserk (more effective than Prayer)
5) The following can also be useful: Frenzy, Inferno, Fire Shield.
In water magic:
1) Blessing
2) Prayer
3) Clone (and the Knight's Castle only has 4 levels!!!)
4) The following can also be useful: Healing, Teleport.
From the above, we can see that the choice of "native" water magic is poorer for the Castle than fire magic for the Inferno. And that means it's easier to predict.
And I'm not even touching on the issue of effectiveness. Fire "tricks" rule :smile51:
P.S. Like you, I usually choose water magic more often than fire magic, because it's simply given more often to the factions we all play, and it's more practical than fire magic (for clearing out neutrals – that is, the main task in any level).