I have pared down to 100 cards, because aesthetics...
In reality, dragon shields come in packs of 100 with only a couple of spares and I'd prefer to only have to buy one pack. I also want the whole thing to be able to live in a dragon shield case, the same as the one Jhoira is in, the Silver.
I feel this draft of the tower is nice, it has a good amount of recursion as well as several cards that seek to fill the yard. I also have a bunch of symmetrical effects that will affect both players in various ways.
I definitely want to goldfish this some more. A few runs through (easiest to test on Moxfield) have felt fun and solitaire-y which is what I was after. The theory is that I can even play this as a solitaire game with difficulty being factors added such as a turn limit, a starting life limit, a clock card like Smoldering Tar.
Also, it probably goes without saying but I will be proxying the entire thing due to the cost of various cards such as the RL cards.
Side note... perhaps I could build a side deck of or even some custom emblems for difficulty?
Some conditions could be:
During each player's upkeep, that player loses 1 life.
During each player's upkeep, that player gains 1 poison counter.
Overabundance
At the beginning of each player's upkeep, Mill 1 card.
etc.