Petra Sphinx [Legends] Predh Sacrifice another creature: Scry 1

Sacrifice another creature: Scry 1

double the number of +1/+1 counters on Primordial Hydra

destroy Cosmic Horror unless you pay {3}{B}{B}{B}

Whenever a Mountain enters the battlefield under your control

Petra Sphinx [Legends] Predh Sacrifice another creature: Scry 1Set: 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?