Apex domains cannot have CNAME records.
Question and response
Question
dig scriptcase.host. NS
Answer
scriptcase.host. 5 NS ns2-stygius.scriptcase.host.
scriptcase.host. 5 NS ns1-stygius.scriptcase.host.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0