Spectral Rider

Intimidate is fear's clean-up act: where the older keyword let a black creature slip past everything but artifacts and other black creatures, this generalizes the rule to each color, so a white attacker gets through unless the defender holds back white blockers or an artifact creature. On a Spirit Knight that mechanic carries a quiet flavor logic, a ghostly rider passing untouched through anyone who does not share its allegiance, but the strategic point is sharper than the rate. Two white mana for a 2/2 is unremarkable in a vacuum; what the keyword buys is reliable evasion against the field that is least equipped to answer it. White's natural opponents lean on green, black, and red bodies, none of which can interpose, so the white-pip cost that makes this card awkward to splash is the same restriction that makes its attacks land. The double-white is doing two jobs at once: it gates the card into a committed white deck and it narrows the pool of creatures that share its color enough to keep blockers scarce in the matchups that matter. As a piece of aggressive design it asks little and promises a recurring two damage that defenders have to plan around with deck construction rather than combat math.