As for balancing:
Ability = Instant PA by itself. That translates into +2 
(I believe the random protection and the 1-for-each-airborne would cancel each other out
I was unsure whether to treat this as +1 or +2. What was your reasoning?
I treated as +2 based on the following:
- Unupgraded, PA is 1 Card + 2
for 1 Protected Permanent . IMHO no card should be able to outdo that ratio of cost/protection without a reasonable drawback or other factor.
I initially thought simply the above was the main balancing factor and used a bit of intuition at that point, but after reviewing the ability I realized there is another reason it is probably worth +2 :
- Had this card been 0 | 5 it would've essentially been a PA that randomly targeted a permanent your controlled.
- That is inferior to to PA, but when rereviewing the other two factors (randomly targets and 1-for-each-airborne) it's worth considering that all of
's creatures are Airborne (Along with about half the ETG creatures in general), which means that for at least every
creature you play Stolas will protect another permanent. (This translates to PA on a stick for 1 Card + 0 Quanta.)
- Since it is 'repeatable' but requires a different 'ability cost' than quanta that is easily fulfilled I felt it was best as a +2. (I assume the majority of Stolas players will run Airborne decks, meaning most if not all if their permanents will likely end up protected. It's also worth noting that normal repeatable abilities can't execute their effect more than once per turn while Stolas technically can protect several permanents in one turn as long as Airborne cards are played.)
Wow. I think this is my first topic that has got the red icon and my most welcomed card idea. This was my rationale for balancing it (although my method is probably outdated)
2atk=2 cost. 6hp=+1cost. ability=+1-2cost. Airbonus=-1.
As for upped, I just took the cost and made it rainbow, like animate weapon. It'd still be roughly the same speed in nonrainbows, and rainbows would have other cards to pack in rather than Stolas. Nonetheless, I'll put up a poll to see what you all think.
Grats.
As for your balancing, it seems pretty close to what I probably did, though I'm curious about where you got the Air bonus from, since the only known bonuses I'm aware of are:
Fire gets 1 free attack plus 1 per 9 cost.
Earth gets 1 free HP.
Aether, 
Life and 
Light get -1 cost for their creatures.
Could you explain why Air would also give an innate -1 bonus?
