Vexac

Ruination is something every card game needs. There's nothing wrong with the concept, never.
You can discuss about being it over/under-costed, but I think it's fine tuned at 9 mana, meaning that you can't generally cast it until turn 6 …

Elusive is a fine mechanic, it's the same as Flying in Magic and it's never been problematic in that game for nearly 30 years.

I acknowledge the problem here, but it's not tied to the mechanic itself imho:
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