what does it mean when it says Power Level 3, or bound spell level of 3. I don't get it.

If you have an item wthat has "power level 3", it means that the effect can be dispelled by your opponent on a 3+.

so, you just say "I want to cast treesinging now." and then they just role dispell dice and get more than a three to dispell it? I need a long explaination of bound spells, as well as an explanation of how to cast treesinging with a treeman. do you have to use dice from your power pool, or what? Sorry that I be so stupid.

It depends. To cast treesinging normally (without a treeman) you need to use your power dice.

To cast with a treeman it is automatically cast (without using any dice) and to dispel it your opponent needs to roll a 3+.

he gets to use whatever amount of dice he has available in his power pool to do this?

You mean the spellsinger? If you do then it depends on their level.

Level 1s: 2 dice maximum
Level 2s: 3 dice maximum
Level 3s: 4 dice Maximum
Level 4s: 5 dice maximum

how many dice does an opponent use to dispel a treeman's treesinging spell, what does he need to roll to do so?

He can use any amount he wants and needs to get a 3+ to dispel it.

It's kind of complicated. The easiest way to think about it is this.
Your're playing Wood Elves and you have a Treeman and a Spellweaver. He's playing Empire and has no wizards.

The first spell you cast is Treesinging with your Spellsinger. He doesn't want you to cast your power, so he used one of his two dispell dice (you get two automatically I believe) He rolls a two and the spell is cast.
You then cast Treesinging with your Treeman. Because he still has one dispel dice left, he can try to dispel this, but if you used two spells with your Spellsinger, he could have tried to dispel both of those and would not have any dispel dice left.
Don't let your opponent trick you into leting him use more dispel dice than he has left. If he has no dispel dice, and you still have spells to cast, there isn't anything he can do to prevent you (aside from dispel scrolls.)
Well I hope this is helpful. I think that I'm probably making this more confusing for everyone with my explanation, so sorry guys. :p

That's the crux of it- bound spells are seldom of use if your opponent has any dispel dice left, so if you want to cast them it's best cast them last.

Just another thing- can bound spells be dispeled with a scroll?
I'd assume so, but I dunno.

Az

Yes, bound spells can be dispelled with a scroll, but their low power levels means they can be dispelled with dice easily, leaving the scrolls for higher level spells.

To dispel normal spells, your opponent has to equal your casting roll, NOT the amount you need to cast. So tree-singing for example isn't dispelled on a 4 unless you rolled a 4. If you rolled a 6 for example, your opponent would need to get 6 or more to dispel it.

With bound spells, treat their power level as their casting value, and they work exactly the same as normal spells for dispelling. Most tree-singing bound spells are power level 3, meaning your oponent will need a 3 or more to dispel it.

The number of power and dispel dice you get is explained on pages 134 onwards in the BRB (big red book).

Bound spells are also a good way of drawing out your opponent's Dispel Dice, especially if you have a big spell coming up.

I always use my bound spells first, because I know that they won't miscast. If you get a miscast that ends the magic phase you won't be able to use your bound spells.

Another reason, like Foxtale said, is to make your opponent use dispel dice on weak spells so you can nail them with the big ones.

Or he will let them all through, saving enough dice for a more powerful spell that you may or may not cast. Either way it's forcing your opponent to think and react to your magic phase more, which will increase the effectiveness of it.

change it around a bit, mix it up, as this can be quite confusing if you don't stick to a routine during the magic phase