A good rule of thumb is that the more resources your opponent has, the less drawing a card helps them, so if you are behind on cards this is likely worth activating
VS Amulet Titan Out: In: Amulet Titan is one of the worst matchups, but they still have a fail rate
White Mage's Staff is the card to trigger those, but unfortunately you shouldnt get passed too many of those as its one of the better commons
Best Gratuitously Huge Option Lets say you went to a concert recently and saw the roadies carrying a bunch of heavy musical equipment, and thought to yourself that what youre witnessing would be the perfect way to move Magic cards
Emet-Selch, Ascian (Krrik, Son of Yawgmoth) When optimized to a cEDH level, K'rrik, Son of Yawgmoth can win as early as turn 1