Petra Sphinx [Legends] 094 Set: Diamond & Pearl: Great

Set: Diamond & Pearl: Great Encounters Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

At the beginning of each upkeep

Set: Sun & Moon: Cosmic Eclipse Type: Psychic Rarity: Holo Rare Retreat cost: Colorless

Set: Sun & Moon: Black Star Promos Type: Psychic Rarity: Black Star Promo

Petra Sphinx [Legends] 094 Set: Diamond & Pearl: GreatSet: Legends Type: Creature Sphinx Rarity: Rare Cost: {2}{W}{W}{W} {T}: Target player chooses a card name, then reveals the top card of their library. If that card has the chosen name, that player puts it into their hand. If it doesn't, the player puts it into their graveyard. What walks on four legs in the morning, two legs in the afternoon, and three legs in the evening?