Shadow use CantBlockBy and static abilities

Shadow can be these two abilities:
* `CantBlockBy | ValidAttacker$ Card.Self | ValidBlocker$ Card.withoutShadow`
* `CantBlockBy | ValidAttacker$ Card.withoutShadow | ValidBlocker$ Card.Self`

Then there is Aetherflame Wall and Aether Web with
`can block creatures with shadow as though they didn’t have shadow`
This can be done in the first ability in checking withoutShadow similar to IfReach.
But i Probably need to check the other ability too because of this rule:
> If Aetherflame Wall gains shadow, it won’t be able to block any creatures (not even those with shadow).

Problem there is Wall of Diffusion and Heartwood Dryad with:
`CARDNAME can block creatures with shadow as though CARDNAME had shadow`
The wording is slightly different so i assume that if gains Shadow, it still would be able to block Creatures with Shadow.

for the second one i need to ask judges.

or if combined. how Heartwood Dryad attached with Aether Web can block creatures with Shadow?

Some Matrix Data Table:

  | Attacker | Attacker
-- | -- | --
Blocker | without Shadow | with Shadow
without Shadow | x |  
with Shadow |   | x
Aetherflame Wall without Shadow | x | x
Aetherflame Wall with Shadow |   |  
Heartwood Dryad without Shadow | x | x
Heartwood Dryad with Shadow |   | x
Heartwood Dryad with Aether Web and without Shadow | x | ?
Heartwood Dryad with Aether Web and with Shadow | ? | ?

`x` = "can block"
`?` = are the rules question below