Spectral Shield

The interesting line here is the second one, not the first: the +0/+2 is incidental, but "can't be the target of spells" is an early attempt to bottle a protective effect into a permanent, written before the templating language existed to say it crisply. The card grants something narrower than the modern keywords it resembles. It blocks targeted spells (spot removal, fight spells like Prey Upon, opposing combat tricks) but does nothing against abilities, so an Oblivion Ring, a planeswalker, or any permanent's activated effect still reaches the creature freely. That gap marks the distance between this Aura and hexproof or shroud, which would have covered abilities too. The friction also cuts both ways: once enchanted, you can't target the creature with your own pumps or tricks either, so the card forces a commitment rather than offering a free shield. And the protection is one-directional in another sense: the Aura itself enjoys no cover, so a Disenchant peels it off and reopens the host to removal. The two-color cost is the part that dates it: pairing white's protective instinct with blue's wariness of removal made sense before the game settled on hexproof and ward as cleaner, often mono-color expressions of the idea. What you are looking at is untargetability caught mid-evolution, a clumsy two-line Aura standing in for a keyword that had not been invented yet.