Goofy has an ink cost of 5, so he will require a little patience to play him during the game
Technically Soundwave, Sonic Spy/Soundwave, Superior Captain also plays in this space, but the card is dumb on so many levels that I refuse to acknowledge its existence beyond this paragraph
There's a variety of Sapphire cards that benefit from an item-heavy deck like this one, and by including them here, you can squeeze some extra value out of them
His -4 gives Spirits you control Double Strike and Vigilance until end of turn
Its also just a good, cheap artifact for decks that want that sort of thing and the venture on untap trigger could be played with in artifact-heavy decks using Clock of Omens
Agadeems Awakening + Shatterskull Smashing Most of the power of MDFCs like Agadeem's Awakening and Shatterskull Smashing comes from slotting them into your mana base at virtually no cost while sneaking a situationally powerful spell into your deck