Flying
When this creature enters, look at the top four cards of your library, then put them back in any order.
Illustrated by Steve Firchow · Urza's Saga · #98
There are no rulings for Spire Owl.
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
When this creature enters, look at the top four cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.
When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.