Cockatrice [Beta Edition] Oathbreaker Maro-Sorcerer's power and toughness are

Maro-Sorcerer's power and toughness are each equal to the total number of cards in all players' hands

but how could that be

Set: Eldritch Moon Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {13} This spell costs {1} less to cast for each card type among cards in your graveyard

Signal Pest can't be blocked except by creatures with flying or reach

reveal the top card of your library

Cockatrice [Beta Edition] Oathbreaker Maro-Sorcerer's power and toughness areSet: Beta Edition Type: Creature Cockatrice Rarity: Rare Cost: {3}{G}{G} Flying Whenever Cockatrice blocks or becomes blocked by a non Wall creature, destroy that creature at end of combat.