Accurate Interval, Clarissa

:When this unit is placed on by riding on "Serious Challenger, Clarissa", 1, look at seven cards from the top of your deck, choose up to one grade 2 or less card with "Earnescorrect" in its card name from among them, reveal it and put it into your hand, shuffle the rest and put them on the bottom of your deck. :During your turn, if you have no rear-guards, this unit gets +5000.