Toxrill has been solved with Sludge Monster? There's still 98 more cards to go! Commander Clinic proliferates your slugfest to the next level.
Golos is banned. Though it is not dead yet. Gentlemen was can rebuild him better, faster, stronger.
Golos, Tireless Pilgrim is a powerhouse. His second ability helps to create a synergistic value engine that is overwhelming to overcome. It's fun to play and provides divergent lines of play each game.
One of the basic level up moments for commander is know your meta. A meta is the group of people you play commander with and the decks they play. You need to know what is in your meta and then you should be putting cards in your commander deck that limits those decks or exploits the weaknesses of them.
One popular archetype for commander is superfriends or planeswalker decks. Depending on the commander, there is a certain repetition of which planeswalkers are found in these decks. As of March 2020, there are 208 total planeswalkers and not all of them are viable options for decks. It makes sense that the strongest planeswalkers show up time and time again in these decks. The following is a list of ten planeswalkers that you should consider when building a superfriends deck