Ah, so that must mean the prep does affect multiple strikes, but only if implied by the nature of the attack/prep. Thanks for clearing that up! :3

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Though i still think that a prep can be used for a plain, non-magical attack. If a character makes any certain action to improve their physical condition (flex their muscle to supply it with more blood, change posture for a better strike, slightly wince for a keener aim and ect.) or concentrate, im pretty sure that may count as a prep. A well placed shot or sword strike may as well bust one's defence and inflict a lot more damage than expected. Unless you character has already perfected each and every of their attacks.