This is because it makes casting it multiple times in a game easier, which is important if your entire deck is built around it
Combine it with Bloomburrows Starscape Cleric (and other options), and then all you need to do is make the opponent lose a single life to start a combination that wins on the spot
Don't sleep on just how good of a mana dork this is
Tutoring an equipment right away sets up your plan, while doubling triggers once Cloud is equipped pushes value through the roof
With the loss of Sensei's Divining Top in Legacy Miracles, Portent created another opportunity to manipulate the top cards of the deck
For example, you could have printed these vehicles in the Commander brew: Myriad Vehicle - 3 mana, 4/4 flying, crew 1, which Myriad Vehicle attacks an opponent or a planeswalker they control create a token copy of this attacking each other opponent