Copy-paste Mortal Coil macros for Warlock in WoW Midnight: mouseover and focus versions, ready to use. Add Shift/Ctrl/Alt spells, raid markers and a chat callout in the macro builder.
Open the macro window (/macro), make a new macro and paste: #showtooltip /cast [@mouseover,harm,nodead][] Mortal Coil
Open the macro window (/macro), make a new macro and paste: #showtooltip /cast [@focus,harm,nodead][] Mortal Coil