Like most Magic: The Gathering cards, the value of Scarecrow Guide depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Wilds of Eldraine)
The difference here is that, while we can end on higher-quality interruption than Odion, we also can seal away games wholecloth by way of Mercurium into a floodgate
Overpowered, no
Provided Decklist: Monsters: 19 || Erebus the Underworld Monarch | Caius the Mega Monarch ||| Ehther the Heavenly Monarch | Witchcrafter Haine || Kuraz the Light Monarch | Mithra the Thunder Vassal ||| Eidos the Underworld Squire ||| Edea the Heavenly Squire ||| Magicians Souls Spells: 18 | One for One ||| Pantheism of the Monarchs | Reinforcement of the Army ||| Tenacity of the Monarchs | Upstart Goblin | Foolish Burial ||| The Monarchs Stormforth || Restoration of the Monarchs ||| Domain of the True Monarchs Traps: 3 ||| The Prime Monarch Note: This is continuing the style of Creative Deck Profile articles, designed to showcase a build through replays rather than through a long article

Also, in case there arent enough ways to Special Summon Mokey Mokey, consider including Guiding Light and One for One With more means to Special Summon, youll have more opportunities to activate Inferno Reckless Summon, and with Guiding Light, if attacks and is destroyed by an oppoents monster, youll be able to apply Mokey Mokey Smackdown
The amount of back issues and organization this shop has is fantastic