While this may not be as effective later in the game, potentially detrimental even, getting four free spells isnt to be scoffed at
Working with the flavor of the pirates we have, there are many easy ways to tweak this deck to make stealing things more consistent and more threatening, forcing your opponents to have answers to things like Enchantments, Planeswalkers, Artifacts, and evasive aggro
Borderless Skullclamp Borderless cards are sometimes just, like, sorta, maybe, I guess better
If I were to upgrade these decks with pulls from booster packs, then I would shave some of these weaker cards, especially ones that cannot be turned into ink, and add more five-drops, six-drops and seven-drops
As a colorless card it can fit just about anywhere, and it makes your opponents choose whether to pay two generic mana extra for their instant or sorcery spells or let you copy the spell
As the blue member of the cycle, it offers a free counterspell that delays creatures or planeswalkers without ever spending mana