Doesn't prevent the attack. Just prevents the attack from having any effect. Yes? And barring any fairly obvious divinations or assumptions on the part of the character ("I have a non-magical sword and I've witnessed magical effects from that bow") the character would have to play on OOC knowledge to know enough not to try.SRD said:An attacker cannot damage a magic weapon that has an enhancement bonus unless his own weapon has at least as high an enhancement bonus as the weapon or shield struck.
D+1 said:Just prevents the attack from having any effect. Yes?