Different Mana Levels Simultaniously
 

What happens with your spells if you are in different mana levels simultaniously? For exemple, if one character have Mana Dumper 2 with the Area Effect Enhancement on a normal mana setting area around him mana will decrease to no mana. Then a huge magical creature, such as a dragon partially enters this NMZ. Will he be able to cast spells? The lasting spells already cast on him goes off?

Re: Different Mana Levels Simultaniously
 

I don't think there's RAW on exactly how multi-hex figures are affected by area effects. So, three obvious choices:

1) Pick a point to use to determine "in" or "out". This should be the head of a multi-hex figure, as that's the point used for other determinations in the rules. (It's also generally where the brain is, so it's not a terrible spot to pick for magic use.)

2) Worst case: the figure suffers the worst of any of multiple levels of the same effect it happens to be in. (In this case, that's the lowest mana area. So, if you're not completely suffused with a mana level, you can't cast spells at that mana level.)

3) Best case: the figure suffers the least of any of multiple levels of the same effect. (As long as any of your body is touching mana, you can draw on it. However, you likely want the same rules to apply to other areas like fire or explosions, so having a pinky sticking through a wall into the fire that kills you might be more annoying than refusing to let a mage stick their pinky into the high-mana zone in the next hex.)

If there's a dispute as to "best" and "worst" effect, read those as "player's choice" and "GM's choice". For the rules lawyers, I'd also throw in a clause into "choice" rules that said once that choice has been made for some figure, it remains consistent throughout the scene. (That is, you can't choose to be the in the normal-mana area to cast your spell, then on your foe's turn claim to be in the no-mana area so his spells can't affect you.)

You could also just go with (4) GM's ruling on the spot or (5) average the effects per hex and use that average.

Seems like the multi-hex creature vs. area effect question would be good oFAQ or certainly uFAQ material.

Different Mana Levels (on multi-hex characters)
 

Gosh, that's a good question that sure seems like it ought to have been answered before... but I didn't turn anything up with a perfunctory search.
Anaraxes had some good suggestions. I might rule that for full-body buffing effects, only the parts of the body in the NMZ have the effect removed. Likewise, for spells that *only* affect a specific part of the body. A lot of spells (like any where the effect is "mental") would be negated if the head were in the NMZ. Casting a spell for someone straddling different mana levels looks like a GM call that just needs to be applied consistently, once made, but A's 1) looks like a reasonable ruling to play with.

Re: Different Mana Levels Simultaniously
 

I'd determine the percentage covered by the effects and round to the nearest whole. So if 5 out of 8 of it's hexes were in a Normal Mana Zone and the other 3 in a Low, they'd be treated as being in a Normal Mana Zone.

On a 50/50 split I'd average the effects and round down.

So if the multi-hex creature is half in a High Mana Zone and half in a Low Mana Zone, I'd call it Normal Mana. If half in a High and half in a No, call it Low and move along.

Re: Different Mana Levels (on multi-hex characters)
 

The head or the heart. That's the way I'd go.

Re: Different Mana Levels Simultaniously
 

Enter the "No Head" + "No Vitals" mage...

Re: Different Mana Levels Simultaniously
 

Well, from my perspective, magic works like this: You cast a fire-bolt, you gather mana and you hurl a ball of fire; however, this ball of fire is plain regular fire. In other words, even if the origin of the fire is magical, the fire you cast is not different than fire from a common lighter.

On full exposure to mana damper:

Mana damper doesn’t stop/affect a fire-bolt when it enters the targeted area. The same principle would apply to “buff magic”. If you enter the mana damper area with a force-field-made-of-magic, it will last as much as the original spell states; but, if your whole body is inside the mana damper area, it will be impossible to keep it further than the spell’s duration (unless you leave the mana damper area).

In other words, mana damper doesn’t shut down spells you have already casted. But if such spells require upkeep, then it’s over unless you leave the mana damper area. This reasoning comes from my conception of spells and a paragraph in B67: “(…) a wizard could throw a fireball at you unhindered, but he would find it difficult to use magic to turn you to stone or read your mind (…)”.

On partial exposure to mana damper:

Partial exposure to a mana-damper area won’t cancel the magical creature’s buffs because the creature is still having access to mana. Also, IMO, it won’t prevent it from casting magic per-se... But It might have some disadvantages.

Let’s change the perspective, we employ oxygen to live, will you die if your body receives vacuum therapy (i.e. on patch of skin in your back)? Obviously not, partial exposure to vacuum is not the same a complete oxygen deprivation. Of course, you might have some difficulties, but it won’t completely “stop” you.

So, my solution would be looking at p. B235 and doing an average between the highest and the lowest mana levels (rounded down) accordingly to these values:

Very high mana: 4
High mana: 3
Normal mana: 2
Low mana: 1
No mana: 0 (or any negative values provided by mana damper or the like).

So, for example, if the magical dragon covers 4 hexes:

Hex 1: Mana 3
Hex 2: Mana 3
Hex 3: Mana 0
Hex 4: Mana 1

The mana level for the dragon will be “mana level 1”. In this situation, it works as being on a low-mana area, thus having a -5 to magic related skills (its spells won’t work if it lacks magery).

Or, for example, if the magical dragon covers 3 hexes:

Hex 1: Mana 2
Hex 2: Mana 2
Hex 3: Mana 0

The mana level for the dragon will be “mana level 1”.

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Re: Different Mana Levels Simultaniously
 

The standard interaction between a no mana zone and a spell is that the spell is suspended within the zone. I would extrapolate this to say that if a spell is partially in a zone, that portion of the spell that is in the zone gets suspended. If the spell is not something that can reasonably be split (e.g. a Wisdom spell), the GM should define a key location, usually either the vitals or the brain, and use the position of that key location.

For casting spells, I would typically set the key location to the brain; casters with No Brain should define an appropriate location.

Re: Different Mana Levels Simultaniously
 

But the source of mana is not you, it is the world, right? And as long as some part of your body is connected to a mana source, you can gather mana to fuel your powers. Thaumatology Magical Styles even features some kind of advantage to work under partial mana areas (not quite this situation, but still...). Regarding spells or items, well, think of a computer and it’s power cord. It won’t shutdown unless the battery runs out or you cut its power supply. Also, how would you explain the fire-ball idea in B67?

Re: Different Mana Levels Simultaniously
 

Do any of the books have example of Mana Damper or Mana Enhancer in play? Or modified versions?