Possible other sources for Brittle?

We have a new form of debuff called Brittle, which increases the duration of subsequent CC effects. I remember when we first were introduced to the Grounded mechanic through Cass, and people started theorycrafting on where Grounded might work elsewhere, and it eventually ended up with Grounded being added onto Singed.

Once we see how Brittle works out, anyone have any ideas for other places where we could end up finding it?

- I think it's a neat candidate for a new passive on Lissandra. Her spells could afflict targets with Brittle, allowing her CC (And other CC) to last longer, and further solidify her position as the 'ice mage.' The Lissandra player could choose whether or not they need to use her W or ultimate immediately for immediate effect, or if it would be worth it to damage them with her Q or E first before using the CC.

- I could see it ending up on the AoE pattern of her ultimate to increase her ultimates usefulness, since most people seem to find it underwhelming since her rework. The arctic storm could apply Brittle to champions in addition to slowing them, allowing her to stun multiple enemies for longer and make the ultimate more impactful.

- Roar of the Slayer's armor shred has always seemed strange to me; it seems like a relic from when Sion was considered a Fighter (He was released as a Fighter, not a Tank). I think replacing the armor shred with Brittle would be more impactful since the shred, at least to me, seems like it's never really useful.

- His passive could apply the Brittle effect after it triggers, not functioning with itself (Wouldn't increase the duration of the passive stun). Would help make him more appealing as a Warden, allowing follow-up CC to peel his allies better.

- As much as I don't want this item buffed for ADCs, a melee-only Brittle effect when the Shred reaches max stacks would probably be overpowered, but I can't help but grin at the idea. It might be out of place, but I like the idea from a thematic perspective.

- Very brief Brittle effect during the on-hit slow?

I'm not saying every one of these suggestions should be added, I'm just tossing around ideas; the idea of a new debuff effect got my mind racing.