Spire Owl [Urza's Saga] Yeti Sewer Nemesis's power and toughness

Sewer Nemesis's power and toughness are each equal to the number of cards in the chosen player's graveyard

if one player has won more Magic games that day than any other player

Set: Fifth Dawn Type: Artifact Rarity: Uncommon Cost: {2} Guardian Idol enters the battlefield tapped

Set: Seventh Edition Type: Creature — Wraith Rarity: Uncommon Cost: {3}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp

Set: Rise of the Eldrazi Type: Artifact Rarity: Rare Cost: {7} Whenever you cast an instant or sorcery spell

Spire Owl [Urza's Saga] Yeti Sewer Nemesis's power and toughnessSet: Urza's Saga Type: Creature Bird Rarity: Common Cost: {1}{U} Flying When Spire Owl enters the battlefield, look at the top four cards of your library, then put them back in any order.