If your monster is destroyed by battle while this card is face-up in your Spell & Trap Zone: Special Summon 1 "Fireball Token" (Pyro/FIRE/Level 1/ATK 100/DEF 100). If your monster is sent from your hand/field to the GY by your opponent's card effect while this card is face-up in your Spell & Trap Zone: Special Summon as many "Fireball Tokens" as possible, up to the number of monster sent. You can only use this effect of "Graveyard of Wandering Souls" once per turn.