Here's my suggestion on how to simplify this card. (Good god
)
1. Remove the upkeep cost. It seems VASTLY underpowered to require 3 different quanta costs as an upkeep for an Air card. Fireflies can't even generate the quanta you need for that, so it'd be forced into a rainbow (which is not a good idea).
2. Why does an Airbourne creature have to loose its 'airbourne' passive when it gets near its roost (i.e. - become 'immaterial/invulnerable')? It can still be theoretically airbourne, as 'Roosting' is done in high altitudes (thus, making it above ground/airbourne).
3. Simplify the text from this:
"For each Airborne creature on your side of the field, heal 1 HP and gain 1
per turn.
Roost: Target friendly Airborne creature loses Airborne status, and becomes immaterial for 1 turn, after which it regains Airborne and loses its immaterial status.
Upkeep: 1
, 1
and 1
per turn."
...to this, and compare the results.
"Gain 1
& 1 HP per turn for each
airbourne creature on your field
Roost:
Target friendly airbourne creature
and give it immortality for 1 turn."
EDIT: ninjaed