Captured by the Consulate is an Enchantment with a casting cost of three generic and one White mana that Enchants target creature you don't control
Sword of Truth and Justice is another one that is pretty good with Venser as the commander since it gives him (conditional) evasion, proliferates, and adds +1/+1 counters to grow your creatures which the deck has very few ways of doing, but I absolutely would not spend $30+ for the card, it's not that good
This then serves as a currency used to bring cards into play, however, there are plenty of other effects from cards that will allow you to add to your ink well, bring in characters and songs and perhaps, for you, more importantly banished the summoned creatures of your rivals
Because they take a while to get going, theyre often vulnerable in the early game, especially if they dont have any other attackers