Adaptive Dissolver

Modular

Action - 0: Equip this to another equipment zone.

Arcane Barrier 1

Rulings

From the Rosetta + 1st Strike release notes

This may be equipped to any of the arms, chest, head, or legs zone during the start-of-game procedure.
During the start-of-game procedure, each player privately selects their equipment and weapons, and then each player equips their selected equipment and weapons starting with the first turn player.
You can not equip this to a zone that already has something equipped to it. You may still activate its ability even if there are no valid zones to equip to (the effect just fails).
When this is not in the arena (including when it is underneath another card) its activated ability is not functional and you cannot activate it to equip it to another zone.
You cannot equip this to an equipment zone your opponent controls.

Keyword notes

Modular - This may be equipped to any equipment zone. It has the subtype of the zone it’s equipped to.

Modular is a static-ability keyword.
Modular does not allow you to equip any other heroes equipment zones, only your own.
Equipment zones include the Arms, Chest, Head, and Legs zones. The weapon zones are not considered equipment zones. You can not equip a card using the Modular ability as though it were an off-hand or quiver equipment etc.

All keywords

Arcane Barrier - is one of the most common ways to prevent arcane damage. If you would be dealt arcane damage you may pay X{r} instead to prevent X arcane damage that source will deal.

You can have multiple instances of arcane barrier.
You can only prevent one arcane damage per arcane barrier per source.
You can prevent arcane damage you do to yourself.
Players cannot respond to the prevention.
To fully prevent a card dealing 3 arcane damage, you would require 3 arcane barrier and 3 resources to prevent it. To fully prevent 3 Runechant tokens (3 instances of 1 damage). You would require 1 arcane barrier and 3 resources to prevent it.
Preventing arcane damage does not destroy the equipment with arcane barrier (unless otherwise specified).
Arcane barrier is a replacement effect. It does not use the chain. Players cannot respond to the prevention.
Each source of arcane barrier can replace damage 1 time per source. To fully prevent a card dealing 3 arcane damage, you would require arcane barrier 3 and 3 resources to prevent it. To fully prevent 3 Runechant tokens (3 instances of 1 damage). You would require arcane barrier 1 and 3 resources to prevent it.
If a card has Arcane Barrier 2, you must pay the full two resources even if it only prevents one damage. You cannot choose to pay one resource to prevent one damage.
You can have multiple instances of arcane barrier, for example Nullrune Hood, Nullrune Cloak, and Nullrune Gloves.
Arcane barrier can be used every time you would be dealt arcane damage. It’s not limited to once per turn.
Each instance of arcane barrier you control can be used 1 time only, each time a source would deal arcane damage to you. For example if a source would deal 5 arcane damage to you, and you control two cards with arcane barrier 1, you will in total be able to prevent 2 arcane damage this source would deal to you.
To fully prevent a card dealing 3 arcane damage, you would require 3 arcane barrier and 3 resources to prevent it. To fully prevent the arcane damage from 3 Runechant tokens (3 instances of 1 damage), you would require 1 arcane barrier and 3 resources to prevent it.
A equipment with arcane barrier does not move to the chain when arcane barrier is used.
You can prevent arcane damage you would deal to yourself.
Players cannot respond to the prevention. Arcane barrier is a replacement effect, not an activated or triggered ability.
To fully prevent a card dealing 3 arcane damage, you would require 3 arcane barrier and 3 resources to prevent it. To fully prevent 3 runechant tokens (3 instances of 1 damage from difference sources). You would require 1 arcane barrier and 3 resources to prevent it.