Minamo Scrollkeeper, Trusted Advisor, Doctor Octopus, Master Planner, Cecily, Haunted Mage/Eleven, the Mage, and Twenty-Toed Toad each increase your maximum hand size to a specific amount and might fit your deck's plan
Basically, it's like your opponent (assuming you cast it during your opponent's turn, which is usually correct) just randomly decided to say "go," right in the middle of doing cool things
Still, the fireworks reverse holo version of Zam is striking and its understandable that its worth over $150 on the secondary market
Magic: The Gathering has much more to offer than regular expansion sets like March of the Machine
Whether or not youd have the mana to do so is another story, but having not actually played the deck yet means I will reserve judgment
They were also worth three Prize cards when Knocked Out by your opponent, so as satisfying as they were to use, they did come with an extra risk