Touhou Discussion Thread - Page 265

One of her greatest abilities (comes from her Last word in IN) is her "Paschal Moon Reflecting Satellite Slash". Normally, she can only have a limited effect on the battle field, through melee combat, repositioning, and line slash techniques (She does not have access to magic). Youmu charges an incredible amount of energy (the same amount of energy roughly that lets her use 200 yojanas in one slash. Accelerating a 40kg body to 0.25c requires on the order of 10^17 J's of energy, or 50 megatons, equal to the largest man-made (nuclear) artifical explosion in human history). Most of this energy is converted into a photon like state, where Youmu sends it towards the moon. Normally photons would disperse, as the moon is not nearly a perfect reflector. However this is not the case. The initial beam is sent with a disperment angle of 0.001 degrees. When it hits the moon, the length of the radius of the effected are is 6.6 km, which doubles by the time the beam returns. The total effected area has a radius of 13km or 169km^2, roughly 8 % of the area in gensokyo (assume gensokyo is 80 km across). The rate of reflection is estimated to be 98%; afterwards medium sized caldera of molten rock can be seen on the moon.
Naturally, this is only useable when the moon is physically in the horizon. Depending on the orientation, the area of effect maybe elongated and slightly weaker (moon closer to the horizon = more spread out).