Petra Sphinx [Legends] Dwarf Warrior Set: Revised Edition Type: Artifact

Set: Revised Edition Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

you may search your library for an Equipment card

Set: Alpha Edition Type: Instant Rarity: Uncommon Cost: {W} Exile target creature

When Eternal Scourge becomes the target of a spell or ability an opponent controls

{R}: Shivan Dragon gets +1/+0 until end of turn

Petra Sphinx [Legends] Dwarf Warrior Set: Revised Edition Type: ArtifactSet: 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?