Send 1 card that mentions "Dark Time Wizard" from your Deck to the GY, except "Foolish Graverobber", then you can Special Summon 1 monster from either GY to your field. You can banish this card from your GY; Set 1 of the following cards to your field.
• Spell/Trap that mentions "Dark Time Wizard" in your GY, except "Foolish Graverobber"
• Spell/Trap in your opponent's GY
You can only use each effect of "Foolish Graverobber" once per turn.