At the beginning of your upkeep, choose one at random
Very low risk in Colorless, Mono Color, or even Dual Color decks, and you can always pop it to exile all graveyards
Five hybrid mana in both green and white means there are likely better options in the modern game, but its still a good consideration
Fred and Daphne team up to lead the charge through your deck or over your opponents creatures (which is an analogy well use for solving the mystery of your Commander pod), while Velma is apt at cracking Clues and acts as sort of a Clue, herself, once given enough resources
Outside of exactly the card Deafening Clarion, Disdainful Stroke can answer all the problematic cards that Negate can, but Disdainful Stroke has the added benefit of tagging Lyra Dawnbringer and Ravenous Chupacabra
Kaito, Cunning Infiltrator has a few things going on for it, notably that you can give a creature unblockable and profit from your creatures hitting your opponents