An introduction to Spellcasting.
Arcane units have the ability to cast spells. They get access to different spells via promotions, ie the more XP they have the more spells they have. As arcane units don't (as a rule) engage in combat, they instead accrue XP slowly over time.
There are 18 different spheres of magic as pictured below and seen in the top left of the screen
You need access to the sphere before you can access the promotions so you can access the spells.
We have Body (the fist), Fire (the fire

and Metamagic (the pink glowy thing). You can gain access to more spheres by certain wonders but mainly by building on mana nodes (see below).
There are 4 technologies that between them open up all spheres (Elementalism, Alternation, Divination and Necromancy). Once you have researched one of these techs, an option to build a particular node appears for a magic user.
Each sphere has 3 ranks of spells. The 1st rank is open to Adepts (like we have). Once we research Sorcery and the Adept is level 4, they can be upgraded to a Mage and can cast level 2 spells. Archmages can be upgraded from level 7 Mages after we research Strength Of Will.
Level 1 spells are, on the whole, useless except for a couple. Luckily one of those is Haste.
I give our trusty Adept the Body I promotion and he can now cast Haste (give an extra turn of movement)
While I'm at it, I promote him to Fire I because the Fire II spell is Fireball and its awesome!
I also change techs to Festivals, as markets can help with the finances and Carnivals with happiness. The worker can probably do more good back home mining and crafting, coupled with the second worker about to pop will help improve the two big cities first. I send the adept towards the two giants, as haste can really help you get out of sticky situations.
Form of the Titan BIADL, someone is more advanced that us, hopefully not Mahala.
The wine is crafted, fish netted in city #2 and a mine in the capital about to be chopped.
We could win this game purely by being alive and not being eaten by whatever is ravaging Erebus.
Someone took Loki's death hard! Think we should be fine....
Same turn Mahala cancels open borders because of .... reasons ...
But that's not the worst bit of news of the turn
Bugger
Have to do this the hard way.
I'm not entirely sure which city he is after so hedge my bets and place the giants with a couple of warriors each strategically to cover both
If we could draw him into attacking the combined forces on the forested hill or draw them into a city.
Festivals came in last turn and I selected Masonry but not really sure what is best.
If we can see off Perpentach, it might be worth going on the attack and getting rid of him, as we need to expand quickly I think. Otherwise, build settlers, mage guilds, adepts, elder councils and expand towards him. Maybe!!!