Some people in Trials of Osiris have been infusing Outbreak into Zhalo, and it is 3-shot, body-shotting people in Trials, meaning it is making it far too fast to kill, and it is making it unfair for us who actually try to use skill in trials, not just using the cheapest possible method, pretty much guaranteeing flawless for them, and an instant loss for us who don't be cheap.
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This is clearly a trick to try to get people to infuse outbreak prime into zhalo's so op won't have to face them in the crucible anymore.