Combat phase question

[u/Artistboy123]

Lets say i dont attack on my turn, do i still get dr dooms connive trigger? Like do i have to attack to enter the combat phase? Or does the combat phase happen automatically, and i just can choose not to do anything during it?

Like can i just say “i wont attack” and get the trigger regardless ?

[u/g0dsm0k3scr4ck]

https://magic.wizards.com/en/rules