Cockatrice [Beta Edition] Oathbreaker but how could that be

but how could that be

Set: Duels of the Planeswalkers Promos 2010 Type: Legendary Planeswalker — Liliana Rarity: Mythic Cost: {3}{B}{B} +1: Target player discards a card

Set: Classic Sixth Edition Type: Instant Rarity: Uncommon Cost: {W} Search your library for an artifact or enchantment card

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

Cockatrice [Beta Edition] Oathbreaker but how could that beSet: 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.