Apex domains cannot have CNAME records.
Question and response
Question
dig magic-tower.net. NS
Answer
magic-tower.net. 5 NS ns-550.awsdns-04.net.
magic-tower.net. 5 NS ns-952.awsdns-55.net.
magic-tower.net. 5 NS ns-1339.awsdns-39.org.
magic-tower.net. 5 NS ns-1627.awsdns-11.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0