3 Nov 2023
If an attacking creature has multiple evasion abilities, such as shadow and flying, a creature can block it only if that creature satisfies all of the appropriate evasion abilities.
3 Nov 2023
A permanent with a shadow counter on it has shadow.
3 Nov 2023
Multiple instances of shadow on the same creature are redundant.
3 Nov 2023
Once a creature has been blocked, that creature remains blocked and will deal and be dealt combat damage even if it gains or loses shadow or if the blocking creature gains or loses shadow.