As long as you have plenty of attractions on hand, you should be able to consistently churn out free spells as you pay them a visit
The next big upside is that the creature portion has a valuable sub-type
Zareth San, the Trickster exemplifies that versatility by being a rogue that deals 4 damage, mills four cards because of Anowon, and steals a creature from their graveyard
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Crystal Skull, Isu Spyglass Crystal Skull, Isu Spyglass is already a blue mana rock, but you wont be satisfied to pay 4 mana just for the ramp
These tend to have pretty powerful stats for a surprisingly low cost, with the downside being that they only get to stick around on the battlefield for a couple of turns