Labyrinth of Nightmare [AST-108] Common Thunder then you can add 1

then you can add 1 "Buster Gundil the Cubic Behemoth" from your Deck to your hand

you can banish this card from your GY as 1 of the monsters required for the Ritual Summon

Set: Legacy of Darkness Card type: Effect Monster Rarity: Common Attack: 2000 Defense: 100 If there is a monster on your side of the field

Set: Ancient Sanctuary Card type: Effect Monster Rarity: Common Attack: 1500 Defense: 700 As long as Umi remains face-up on the field

or leaves the field because of an opponent's card effect while its owner controls it: You can Special Summon 1 "Amazoness Queen" from your hand

Labyrinth of Nightmare [AST-108] Common Thunder then you can add 1Set: Ancient Sanctuary Card type: Continuous Trap Rarity: Common During the End Phase of each turn, change the Battle Position of all face up monsters on the turn player's side of the field.