WI NO 1st Ecumenical Council in 325 AD?

In 325 AD and while the Church was shaking by the Arianism herecy, Emperor Constantine I decided to call a general council of every Bishop in the Empire to deal with the herecy and other matters of the Church. 318 Bishops answered the Emperor's call and 1st Ecumenical Synod was convened in Nicaea in Bithynia which pretty much shaped christianity by drafting the Nicene Creed, condemning Arianism, fixing Easter date etc.
WI Constantine I didnt convene the Council and let Church hanle its own affairs by herself? What would be the impact on christianity without the council?
 
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