While a card with an Adventure is in your hand, library, or even exile, it has only the characteristics of the permanent, not the Adventure spell
At this point you can invest in cards like Ashe, Princess of Dalmasca, Combat Tutorial and Adventurers Airship to help keep your hand fueled, and even more cheap interaction like Youre Not Alone, Ice Magic and Syncopate to force through the win
You could remove some of the vanilla (no ability) or French vanilla (just one keyword) characters
While this character can come out at four ink, you can play him for free by exerting four of your items
Whenever equipped creature attacks, if it's the first combat phase of the turn, untap it