Neither player can Special Summon from the Extra Deck more than 2 times per turn, except "Number" monsters. You can only use each of the following effects of "Barian's Seventh Untopia" once per turn. During your Main Phase: You can add 1 "Umbral Horror" monster from your Deck to your hand, then discard 1 card. During the End Phase: Each player takes damage equal to the number of Xyz Monsters on the field x 400.