Restricting your deck to only mono-blue spells removes options, but you can funnel all that mana into blue card draw spells to trigger the likes of Psychosis Crawler and Ominous Seas to bury your opponents in card advantage, damage, and triggers
The real strength of this card is in its key ability - Collect Taxes, which forces each opponent to lose two lore if they have more lore than the player currently controlling Prince John, Phony King, whenever the card quests
Rude Awakening 4 This is somewhat of a Craterhoof Behemoth for a very land focused ramp deck
At the time of writing, this card has a market price on TCGPlayer of $391.67 USD
Creating additional combats is incredibly powerful but needing to Crew one with Baltheir and Fran, and pay three mana, is a lot of requirements for Standard
Getting three extra mana a turn especially late in the game is a great way to overwhelm your opponents in value as mentioned before