[riskable]

They're "space runes" from ancient alien civilizations that allowed humans to briefly glimpse their technology.

[airstrike]

https://spkeyboards.com/collections/semiotic-keycaps

[rlupi]

I am waiting for someone to write an APL descendant using Linear A... there is already a keyboard for it: https://shop.keyboard.io/collections/the-keyboardio-model-10...