SCP-23: a normal stack of cards

ITEM#: SCP-23

Object Class: SAFE

SCP 23 is a stack of yugioh cards that summon real monsters,traps and spells. We got the cards from a man that got them for his kids 8th birthday from a garage sell and when his kid got it he played with his friends right away but when he summoned a monster it was right in front in him they thought it was a hollow-gram until the kid he was playing with got burned alive. Thats all he told us before he started crying and running away. Now SCP 23 stays in a little box and we use the cards to test them on d-class personnel and they come in use for fighting some of the scps but the only people who can use the cards are guards who survived scp attacks. well thats all the info i have time to record today sorry.