Two things that will help you manipulate Chant of Rage though.

1. Hinderance and other movement impairing effects. If your creature CAN'T perform the mandatory requirement, then it is free to do whatever action it wishes.

2. Other Mandatory effects. If the creature has two competing mandatory action requirements, then its owner gets to choose which one to obey. So things like Blood Lust and Siren's Call can be useful here.

You are completely correct. During the Pay Cost step, you only pay 8 mana. Then during the Resolve Spell step, you resolve the effects in the order they appear on the card. So you first gain 2 mana, and then you destroy the equipment. When you go to destroy the equipment (after having gained the two mana) you must pay 2 mana due to the Rune in order to succeed at the destruction.

So, yeah, you've got it 100% right.

You only get the bonuses (both the extra attack dice and the bonus to the effect die) for the attack in which the tokens are removed. Just the one attack roll. This actually doesn’t have to be the first attack though, since removing the tokens to activate the ability is optional.

Follow the steps.

1. Declare Spell
2. Pay Costs (here is where you pay for the spell)
3. Counter Spell
4. Resolve Spell (here is where an attack is generated leading to the attack steps)

1. Declare Attack
2. Pay Costs (you've already paid for the spell, but if something makes you pay for the attack, such as a Suppression Cloak, then you must pay that cost now).
3. Roll to Miss (here is where you resolve the Daze condition)
etc

Remember that a crucial key rule in Mage Wars is that nothing is ever retroactive. You can not ever affect the past. Thus, if you simply follow the steps, it will help you figure out questions like this. Since the Daze is resolved after costs have been paid, it is incapable of affecting the cost. You've already paid by that point and that's that.

So, this might muck things up a bit, but for the sake of complete and accurate information, the "Holy Mage Only" restriction does prevent a few things other than just including it in your spellbook. Per the Supplement, this restriction prevents a non-Holy Mage from including the spell in their spellbook, casting the spell during the game, or controlling the spell during the game.

That said, Arkdeniz's answer is still correct. Familiars essentially check back with their Mage regarding Mage restrictions. Think of them as an extension of the Mage, casting the spell on behalf of their Mage. So, Holy Mage Only is not a problem for Cassiel. But the subtypes of Eye for an Eye are. She can't cast it because it's neither Healing or Protection.

Just here to confirm that Exid is correct. It is a special ability, not an attack, and does NOT benefit from the Ranged +X trait.

The requirement includes revealing it during the Roll Dice step. If that step doesn't occur, then the requirement hasn't occurred and you won't be forced to reveal.

It might be clearer if you skip ahead to after the comma. "You must reveal Glancing Blow at the beginning of the Roll Dice step." Well, that sounds crystal clear to me. If there's no Roll Dice step, then there's no reveal. The specification of "when this creature is attacked" may seem a bit unnecessary since there is no such thing as a Roll Dice step anyplace other than attacks, but I still think it helps. It tells us what action we should be looking out for. I might have moved it to the end of the sentence though: "You must reveal Glancing Blow at the beginning of the Roll Dice step, when this creature is attacked."

Either way, the result is the same. Yes, being attacked is part of the trigger, but so is processing the Roll Dice step. You can't fulfill the instructions without both happening.

Yeah, the terminology can be a bit tricky. After you activate your creature, it has been activated and remains so until it's done acting. This whole time period in which it is active is called both its activation and its action phase.

Exid is completely correct that the condition falls off at the end of the creature's activation, i.e. the end of its action phase. Which is NOT immediately after it has been activated. This will happen regardless of what actions the creature actually takes. A common tactic is to just guard with the creature, because then you will still get to use its attack in the form of a counterstrike. If we're talking about a Mage, you will want to wait until after your action phase before quickcasting any attack spells, so that the Daze doesn't affect the attack spell.


If it helps, the terms can be loosely described as thus:
Activate = (verb) Describes flipping the creature's action marker. This is the first part of a creature's action phase.
Activated = (verb/adjective) Describes a creature whose action marker has been flipped and is now in their action phase.
Activation = (noun) Describes the entire process of flipping the action marker AND acting with the creature, making it synonymous with the creature's Action Phase (and less confusing if you just say Action Phase).