Ingenious Thief

Flying
When this creature enters, look at target player's hand.

Island

Peek

Look at target player's hand.
Draw a card.

Clairvoyance

Look at target player's hand.
Draw a card at the beginning of the next turn's upkeep.

Glasses of Urza

Gitaxian Probe

({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.

Spy Network

Look at target player's hand, the top card of that player's library, and any face-down creatures they control. Look at the top four cards of your library, then put them back in any order.

Vendilion Clique

Flash
Flying
When Vendilion Clique enters, look at target player's hand. You may choose a nonland card from it. If you do, that player reveals the chosen card, puts it on the bottom of their library, then draws a card.

Cracked Skull

Enchant creature
When this Aura enters, look at target player's hand. You may choose a nonland card from it. That player discards that card.
When enchanted creature is dealt damage, destroy it.