Semak-samun feels like “red Turing” (a design I love). They both:

• can't be broken by AI (though Turing can be broken by Botulus, which Semak-samun is immune to).
• end the run unless the runner pays three “units-of-value” (though Turing’s clicks are generally more valuable than Semak-samun’s cards).

Notes

In particular, while protecting Fujii Asset Retrieval, its End the Run or Lose Cards-in-Grip becomes “hardened” into just an EtR; ditto Turing’s End the Run or Lose Clicks while protecting Ikawah Project. This makes it a “true Barrier” (the ice-type defined by almost always having at least one Hard-EtR subroutine). And its 1inf/5 (like Wraparound) makes it a splashable as tech/hate.

The Runner cannot break the printed subroutine on this ice except using a fracter. is invulnerable to:

• Boomerang(!)
• Botulus
• AIs: like Audrey v2 or Matryoshka.
• “Painting”: like Chromatophores (since it makes this Barrier into a Code-Gate, it won't make your Decoder into a Fracter).
• Physarum Entangler (just by being Barrier).

but is still vulnerable to:

• Tsakhia "Bankhar" Gantulga
• an Arruaceiras Crew pair
• Malandragem (having 3 strength or less).

Custom

This implicit ↳ End the run unless … is what makes Barrier Bioroids (like Brân 1.0) more interesting. (Even when the … is too steep price to pay in most games, for you *not to immediately prioritize finding/installing the Fracter.)*

Relatedly, I was playing around with “Clone ICE”: that are breakable by “spending your grip” (suffering net damage, trashing specific cards from hand, or so on); as Bioroid ICE are by “spending your turn” (a resource that's always available but never abundant). For example, Nisei II Engram :

[$6] ICE [6s]: Code Gate - Clone
[jinteki 3/5]

Suffer 2 net damage: Break 1 or
2 subroutines on this ice. Only
the Runner can use this ability.

↳ Purge virus counters. Gain 1[$]
for each counter removed and
program trashed.
↳ You may install 1 facedown
card from Archives, ignoring
all costs.
↳ End the run.

Flavor

• semak-samun, means “thicket” (and the plural “thickets” would be initially-reduplicated, “semak-semak samun”?), being pronounced like SUH-ma’ SA-mon: You need a machete (Fracter) to bushwhack through, since most tools (AI/Viruses/etc) can't deal with such a non-solid & high-area terrain-obstacle (Barrier). Even without one, you can still crawl (facecheck) through the thorns (subroutine), but if you don't turn back ("end the run unless …"), it will severely lacerate you ("… unless you suffer damage").
• [EDIT (HT @StaticSky)] Also, semak samun is a pun, “check for bandits”, where semak as a verb means “check/examine”, and samun as a (non-compound) noun means “bandit/robbery”: against the banditry of netrunning.

PS. Under the artist credit, NetrunnerDB now includes the pronunciation guide! (Both an English approximation and the International Phonetic Alphabet notation.) You can even listen to an automated text-to-speech, by copy-pasting its IPA into a website:

• ˈsə.maʔ ˈsa.mon
• ipa-reader.com

or with a direct link:

• ipa-reader.com/?text=%CB%88s%C9%99.ma%CA%94%20%CB%88sa.mon