countdown to click in from 5, 4, 3, 2, 1, etc

It is possible but it would not be very helpful, since there would be factors that would ruin the command such as the delay of the chat, the transmission and the game itself when matching, so creating a coltdown of this style would not be practical at all

It's actually been very helpful in the World of Tanks community where influencers have special accounts once "killed" grants the (player) killer gold (premium currency), this is a very popular request (in our circle) and I've asked my fellow influencers and they can only replicate it with stream decks or so I'm told. So viewers will be able to click into battle (random match maker) and hope to get into the same battle and possibly kill you.

Ok, in that case you only need this command, but since nightbot cannot send messages in a period of 5s, each number will be sent with 5s delay

!addcom -cd=5 !start $(urlfetch https://vxrl.xyz/smm/5/4/3/2/1/LET'S GO?i=5000&d=1)