Solitude stays relevant in the format as long as powerful creatures are being played
The second effect of this saga returns all non-Phyrexian creatures to their owners hands, potentially clearing the board in time for its final effect which allows you to cast any number of spells from your hand without paying their mana cost and then transforms The Great Synthesis back into Jin
That's great for filling that 'yard and triggering your leaves the 'yard stuff
However, if you fail to hit these cards, there is a secondary route you can take that can help you still get the cards you need
To keep the party going, youll need to look for the Cabaretti mana smoothing cards Rakish Revelers , Cabaretti Courtyard , and Jetmirs Garden
Or you could take it even further with cards like Etali, Primal Storm that use combat to cast spells