У вашего броузера проблема в совместимости с HTML5
1) Unusually, if Sacred Trial is played before Mirror Entity, Sacred Trial will set the minion 'pending destroy', then Mirror Entity copies the minion, but the copy is not set 'pending destroy' and does not die. This is likely to be a bug, possibly related to how the Vaporize vs Freezing Trap bug was fixed (by making 'pending destroy' be cleared whenever a minion enters play), or possibly very old.
2) Mirror Entity before Sacred Trial triggers in that order and works as expected.
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Log: https://gist.github.com/Patashu/5c32200183308a1e19a1
Patch: 4.0.0.10833 (LoE patch)
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