Get a Free 3-6 Star Baron Zemo this Week!
Log in to the Summoner's Market at https://store.playcontestofchampions.com/ and claim the Baron Zemo Selector between 10am PT November 24 and 10am PT on December 1st.
Proven and Below: 3-Star
Conqueror/Uncollected: 4-Star
Cavalier/Thronebreaker: 5-Star
Paragon/Valiant: 6-Star
You can only claim this Baron Zemo one time. The Baron Zemo is delivered as a selector, claiming it will require you to choose your rarity immediately. If you plan to change your Progression level during the Cyber Week event, we suggest you wait until you have made that change before claiming this selector.
Log in to the Summoner's Market at https://store.playcontestofchampions.com/ and claim the Baron Zemo Selector between 10am PT November 24 and 10am PT on December 1st.
Proven and Below: 3-Star
Conqueror/Uncollected: 4-Star
Cavalier/Thronebreaker: 5-Star
Paragon/Valiant: 6-Star
You can only claim this Baron Zemo one time. The Baron Zemo is delivered as a selector, claiming it will require you to choose your rarity immediately. If you plan to change your Progression level during the Cyber Week event, we suggest you wait until you have made that change before claiming this selector.
Anyone Complete all Difficulties of Symbiote Monthly With Only Low Star Champs?

It seems that this could be possible to complete with only 1&2* champs by using only the symbiote, selecting the other champs for synergy, and using boosts. A complete newbie couldn't do it because of entrance criteria, but one with only a few 4*s that weren't useful for synergy could.
Perhaps someone has done this with a second account, or as a challenge?
Perhaps someone has done this with a second account, or as a challenge?
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Comments
It's not just possible, it's exactly what is intended. You aren't supposed to beat Symbiote difficulty using anyone else.
Omg, you must be so good