Ordeal of a Traveler

Edison Card Text
You can only activate this card's effect when your opponent declares an attack. Your opponent selects 1 random card in your hand and calls the type of the card (Monster, Spell, or Trap). If your opponent calls it wrong, the attacking monster is returned to its owner's hand.
Dark Beginning 2 • 2005-07-27
No targeting
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●You can activate the effect of Ordeal of a Traveler each time your opponent attacks.
●You must show the card your opponent selects to your opponent.
●If your opponent calls it right, the attack resolves normally.
●You can't activate Ordeal of a Traveler’s effect if you have no cards in your hand.
●When Ordeal of a Traveler & Fairy Box are both active, Fairy Box (mandatory) is step 1 of the chain, and Ordeal of a Traveler (optional) is step 2.
●When you activate Ordeal of a Traveler’s effect as a chain to Magic Cylinder, since Ordeal of a Traveler resolves first, if your opponent guesses incorrectly then the attack does not resolve and the effect of Magic Cylinder disappears. If multiple copies of Ordeal of a Traveler are active, their effects are cumulative.
edisonformat.com
You can activate the effect of "Ordeal of a Traveler" each time your opponent attacks.
You must show the card your opponent selects to your opponent.
If your opponent calls it right, the attack resolves normally.
You cannot activate "Ordeal of a Traveler"’s effect if you have no cards in your hand.
When "Ordeal of a Traveler" & "Fairy Box" are both active, "Fairy Box" (mandatory) is step 1 of the chain, and "Ordeal of a Traveler" (optional) is step 2.
When you activate "Ordeal of a Traveler"’s effect as a chain to "Magic Cylinder", since "Ordeal of a Traveler" resolves first, if your opponent guesses incorrectly then the attack does not resolve and the effect of "Magic Cylinder" disappears. If multiple copies of "Ordeal of a Traveler" are active, their effects are cumulative.