To clarify: Even under the rules as written, Samandriel can still be Healed by the Asyran Cleric. This is because Samandriel has LIGHT immunity, and the Asyran Cleric's heal ability is not a Light attack and does not do Light damage. (The "hand with light coming out of it" icon just says it is a healing ability, it is not the symbol for the Light damage type. The symbol for the Light damage type is an orb of light with no hand, as appears on the card "Pillar of Light".)

This is correct. Note that +2 vs. Flying does not have the "only the first attack of the attack action" clause, so if you have a Doublestrike attack, each of the attacks will get the bonus.

In other words, sdougla2 is correct about the three questions he answered, and the answers to the other two questions are:

- He can teleport out of a Tanglevine, etc.
- He is not affected by Hindering, because Hindering only matters if you are actually taking a move action.

This will be clarified in the next rules update. The clarification that will be made is as follows:

- The term "damage barrier" in these rules refers to the effect itself, not to the card providing the effect. (This is necessary, because future effects may give Damage Barriers without the Damage Barrier being tied to a particular card.) Thus the Circle of Fire, for instance is not a damage barrier itself; it is an enchantment that provides a damage barrier.

- As always, if multiple continuous effects affect the same object, they are applied in timestamp order. (Thus, since you can only have one Damage Barrier, the first effect providing a Damage Barrier will function, then the next effect providing a Damage Barrier will fail to function.)

In other words,

- If you put on the Demonhide Armor and then reveal the Circle of Fire, you will have the armor bonus from the Demonhide Armor and the damage barrier from the Demonhide Armor. (If the Demonhide Armor is later destroyed, its damage-barrier-providing effect will go away, so you will then be able to use the Circle of Fire's damage barrier.)

- If you reveal the Circle of Fire and then put on the Demonhide Armor, you will have the armor bonus from the Demonhide Armor and the damage barrier from the Circle of Fire. (Again, if the Circle of Fire goes away, the Demonhide Armor's damage barrier will begin to function.)

On an Autonomous equipment, it counts as the equipment making the attack, not the Mage making the attack. So it would not break the Charm.

Yes. Nullify can be cast on an enemy creature, and it will stop incantations which target that creature, such as a "Heal" spell.

Note that it only stops enemy incantations and enchantment spells. It will not stop abilities which say "as a quick spell" (like Arcane Zap) because although those do count as spells, they do not count as incantation or enchantment spells.

Intercept requires a Guard marker. This is already stated in the rules.

It is in the FAQ now, under "Reverse Magic".