Shred (🎸) “pseudo-breaks” any single EtR-effect:

• a defensive Upgrade trigger: Manegarm Skunkworks, Anoetic Void, ¿or Hyoubu Precog Manifold?.
• an off-server usage: like LEO Construction or B-1001.
• a non-subroutine ICE ability: like M.I.C. (saving a click), or Funhouse (saving a tag).
• and a Barrier/ICE subroutine (esp. gearchecks): Tatu-Bola, Ablative Barrier, Ping, Descent, Flyswatter), etc, as well as an ∞ strength Tree Line; but not a Kessleroid).

In particular, it converts a single ↳ End the run. subroutine into ↳ End the run unless the Corp reveals and trashes 1 card from HQ at random. (at the worst-ish). CF. Lucky Charm.

For example, Shred can:

• “melt past” a singular gearcheck;
• unless the Corp suffers “1 HQ damage”;
• while still triggering Phoenix (since the EtR-sub was not broken, yet the ICE was passed);
• thus forcing the Corp to suffer “1 HQ sabotage” anyways; CF. The Corp trashes (1 card at random or) 1 card of their choice from HQ.

Like Light the Fire!, Shred “attacks” (requires) larger server-roots (X is the number of cards in the root of the attacked server.), which makes it implicitly (but not necessarily) a Run a remote server. event.

For example:

• If the Corp is defending an agenda alongside Skunk–Void, they must Trash 3 cards from HQ at random..
• If the Runner has two clicks or five credits to spare (for the Skunk), the Corp must (have and) trash 5 cards from hand. Even a six-card PD couldn't retrigger Void (IIUC).

Flavor-wise, besides obviously “shredding” headquarters into archives, the flavor-text puns on “The Medium is the Message” . Some punk music can literally be about (IE. “the message”) volume/venue (IE. “the medium”).

PS. What if Shred had a Fracter subtype for Rising Tide? Because it can “frac through” any single-sub Barrier (even a high-strength Tree Line), like a “red Inside Job”.

Once Rising Tide was spoiled, I made a cycle of custom Run - Fracter|Killer|Decoder cards like:

[$2] Shred!
Event: Run - Fracter
[anarch 2/5]
Run any server.
The first time the Corp would end that run, prevent the run from ending unless the Corp takes 1 bad publicity.
If a barrier ability would end that run, instead prevent that run from ending.
(Subroutines are abilities. The Corp cannot take bad publicity to end the run this way.)

However (since Events are self-trashing), the problem is that you could just spam Shreds to “place 3 strength counters” on a Rising Tide. Some solutions would be: a one-per-namesake limi; a binary (non-scaling) check for non-icebreaker fracters; an option (for the Corp) to RFG the event; or so on.