It could be the Forcemaster who has to carry the brain-container. It would take up one (or both) hand-slots denying the forcemaster galvitar.

If the forcemaster puts down the brain, the upkeep cost rises and the brain becomes more vulnerable to attacks.

I prefer any combination that produces some decent frost spells:

Air + Water
Air/or/Water + Earth
Air/or/Water + Mind
Air/or/Water + Dark
Air/or/Water + Holy
Air/or/Water + War
...

Imagine you had a couple of building blocks at your disposal and you could use them to build your own creature or conjuration. That is more or less what assimilate would accomplish on the board: You cast certain cards (with a common name??) on the board and they become one creature or conjuration when they are in one zone and all the stats would all add up.

When the assimilated object takes damage, the controller decides which card takes the damage and if it is destroyed, which card takes the remainder of the damage (and so on...) If a card has damage but is not destroyed, it will be take the next damage until it is destroyed.

Let's say we have an assimilating worm:
* Each card is lv1
* Each card has 4 life
* Each card has one attack die
* Each card has 'assimilating worm' in it's name

* Some cards have armor +1
* Some cards piercing +1
* One card has channeling 1, ability to cast incantations and unique
* One card has the cantrip trait
* ...

When activating the worm, it may split up and you could move part of it into another zone. (Add an active activation marker to the part of the worm that hasn't acted yet. It may be activated in a later activation round.) You now have two assimilating worms with different (lower) stats.

If two parts of an assimilating worm meet each other in a single zone, they merge into one creature. (Remove the action marker from the part that was already there, use the ready marker from the part that entered the zone.)
NOTE: This probably requires assimilate creatures to enter the arena with an active activation marker...

A repulse could scatter the worm in all directions.

A zone attack would only attack the assimilated creature once.

When pushed through a wall of thorns, add the level of each card to get the level of the assimilated creature.

As for conjurations:
* A spawnpoint that casts assimilate-creatures. The parts would be quite costly, as you can rebuild the spawnpoint when it is being demolished. The parts themselves could all have 3 live 1 armor. Each part would have it's very own stats too: one part with channeling 1 + unique, one part with -2 Water OR Fire OR Air OR Earth (OR Frost), one part with cantrip, one part with obscured, (??one part with doublespawn??)...

* A slow moving siege tower with a bunch of different weapens (with their own ready markers) and/or defenses...


It looks more like something to build a new mage around than a new trait, but i like the idea of numerous Lv1 cards that build a Lv5 (7 or 12) creature or conjuration. Also while it takes damage, it's abilities disappear...

Please tell me if this is a bad idea or not.
Greetz!

Parade of the unbled.