This card is one of Anarch's trio of static-strengh cost efficient breaker from the core set. Morning star is the most expensive of the trio with 8 and . It's also hardly unsplashable with 4 influence.
There is currently 19 ICEs that can be broken with this card:
and 7 barrier ICE which it could not break without help from other cards:
Considering most barrier are ETR, Morning Star helps a lot in gaining access to any server. The downsides other than its install and splash cost is the low number of barrier with more than one subroutines. Barriers with more than 1 subroutines that can be broken with it are: Ashigaru, Eli 1.0, Hive, Markus 1.0, Wall of Thorns, advanced Tyrant and Galahad.
Install Corroder + Run on Eli 1.0 = 6 Credits Install Morning Star + Run on Eli 1.0 = 9 Credits Second Run with Corroder 6 (first run) + 4 = 10 Credits Second Run with Morning Star 9 (first run) + 1 = 10 Credits Third Run with Corroder 10 (first & second run) + 4 = 14 Credits Third Run with Morning Star 10 (first & second run) + 1 = 11 Credits — Torf