It is more than strong enough at the point where you can secure it while milling for Great Masters and Summons while providing non-negligible combat power on the board
Not background necessarily, but some other line of text that says something along the lines of Whenever you sacrifice a Treasure token, give a creature a +1/+1 counter and trample until end of turn. That would make it a lot more interesting and powerful, but I suppose not every card needs to be great
No technical skills are required
With the amount of savings on the line, this makes a lot of sense
Timey-Wimey teams up the Ninth, Tenth and Eleventh Doctors - plus their respective companions - while Blast from the Past features the first eight Doctors and Paradox Power the 12th and 13th Doctors
While this does come at the cost of your life, Commanders 40 starting total life makes this not a problem