I want a Ruin Guard companion, permanent or event. Build-A-Ruin-Guard-Workshop!

Imagine if you could have a Ruin Guard companion that you could summon to assist you in a battle. (Perhaps with a cooldown so you can't use it all the time?)

To make it more in depth, make it so you can customize it in various ways. Discover new parts for it to alter attacks and give it new ones, change how it looks, and so forth.

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It will probably never happen, but I think it'd be a fun little thing. Even if it was just some kind of event.