Necro Shroud/Death Collector

[Mode Keen]

Had an issue where Death Collector was brought into play and readied by Necromancers Shroud but was not killed at the end of the turn which caused an obvious tactical error. There were no other effects at all in play to keep Death Collector alive. Necro Shroud states the ally brought into play is killed at the end of the turn but it wasnt.

[BP Holy Punisher]

Was Shroud destroyed on that turn? So if Shroud leaves play its killing effect will not trigger. That's a combo used mainly from Baduruu, where you attack with the hero first to get retaliation from an ally and reduce Shroud to 2 durability. So when you activate Shroud to bring an ally back, it is destroyed and your ally stays in play.

Or you can play a second Shroud on top of the old one so the ability of the first one will not trigger.