Sorry for coming up with an idea that might not be appropriate for this patch, but I just thought of the idea of having 4 wonders under "Elementalism", each an altar of the 4 respective elements, earth, air, water and fire. Each of them could have a special bonus like the Palace of the Caliph AND producing an element each***round.
The names could be changed to something more interesting (or keep the Caliph name on one of them).
As far as I know only the earth elemental is made so therefore this is somewhat far fetched (2.04--> stuff?)
Also:
-Altar of Earth: 50% extra shields and an earth elemental each 8 rounds
-Altar of Water: 1 extra commerce in water tiles (like seafarers guild) and a water elemental every 6? rounds (more frequent than earth): Water elementals: Naval, pure combat unit.
-Altar of Fire : 50% Science bonus and a fire elemental every 4? rounds: Fire elemental: High attack and 0-bombard (with xtra ROF (2?) simulating the scorching heat).
-Altar of Air: +1 Naval movement (replacing wind mastery?) and produces an air elemental every 2? rounds (or higher). Weaker, but very fast flying unit.
The core should be different costs, bonus and recruiting rate due to the difference of the four elements.
Just a though, and sorry Mr. Do for posting here, but I though it might be possible to achieve within this patch if the graphichs were available
Best regards. Frosty