The First Doctors ability to add +1/+1 counters is likely to mostly be used on creatures, but its nifty to think about putting it on Vehicles like the TARDIS
There are a number of resources out there that allow you to plug in your decklist and get a breakdown of what percentage of your cards need specific colors of mana, what the average converted mana cost of your cards is, and other helpful information (Im partial to Tapped Out personally)
Magic: The Gatherings third and final Universes Beyond set release of 2025, Avatar: The Last Airbender will introduce over 300 new cards to the games Standard format, all of which feature beloved characters, themes, and locations from the iconic animated series
The town aspect of The Wandering Minstrel can be included in the deck too if you enjoy it, but it is not a necessity
Its quite easily the cheapest of the new Eldrazi titans, and will probably stay there, but theres a chance that it could actually go up if it finds the right deck