Note: If you play Morg into Zoe you need to Black Shield BEFORE the debuff goes on the target
If you do it after Sleepy Trouble Bubble hits they still go to sleep.
However according to the Urgot you can Black Shield his ult to prevent the execute.
Gotta remember to re-check after this game. It was about 30 minutes in. (That last sentence is just a reminder for myself)