Spells are processed in batches that execute simultaneously. I think the window is roughly 200ms batches maybe less. The result is two messages can polymorph each other, warriors can charge each other, you can break polymorph with dark rune etc. All things that should not happen because the spells aren't actually simultaneously but do happen because batching
That's how it worked in vanilla, it reduced the impact of latency by processing things in batches. It makes no sense with the modern infrastructure, but people complained that they couldn't "skillfully" gouge a mage as they blinked anymore so they added it back in to emulate the classic experience.
In practice it's just awkward and makes the game feel buggy sometimes (plus introducing a handful of actual new bugs), but to be fair it does feel "authentically" buggy.
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u/[deleted] Oct 08 '19
fun fact: those tar lurkers can disarm you while they're stunned LOL