A single turn with Superfriends is going to be longer than normal just because you have to decide how to use each planeswalkers effect
It doesnt have to be your opponents permanents, huh
1993 Magic: The Gathering Alpha Time Walk The Most Powerful Extra Turn Spell: Take an extra turn has always been one of Magics strongest mechanics, and Time Walk remains the most efficient extra turn spell ever printed, restricted in Vintage and banned everywhere else
It requires no repeated mana input to work, giving you the room to really progress your game plan
That means if you are casting your mill win cons against a graveyard literate deck, which is very common in Commander and other kitchen table formats, that the milled stuff won't hit the graveyard or trigger their Syr Konrad, the Grim
We all know how good creatures are that add effects that were strong artifacts or enchantments and put them on bodies that can swing