It is not destroyed by any Magic Card Trap Card Monster Effect Cards!

Each turn, you force your enemy's monster to attack, and destroy your enemy's monster. Half of the destroyed monster's total Attack Power is deducted from your enemy's Life Value

Each turn, your enemy must discard half of their deck into the Graveyard to maintain the effect of Shoutembelok's Golden City. (If there is only one card left in the deck, because it cannot be maintained, Shoutembelok's Golden City is destroyed! )