Rottenmouth Viper (Promo Pack) [Bloomburrow Promos] Fallout and awoke to find it

and awoke to find it had followed him from the dream into reality

Set: Planechase 2012 Type: Creature — Faerie Knight Rarity: Rare Cost: {1}{U/B}{U/B}{U/B} Flying

any player may sacrifice two lands or have Worms of the Earth deal 5 damage to that player

" —Poetics of Hanan

which tells the player

Rottenmouth Viper (Promo Pack) [Bloomburrow Promos] Fallout and awoke to find itSet: Bloomburrow Promos Type: Creature Elemental Snake Rarity: Mythic Cost: {5}{B} As an additional cost to cast this spell, you may sacrifice any number of nonland permanents. This spell costs 1 less to cast for each permanent sacrificed this way. Whenever Rottenmouth Viper enters or attacks, put a blight counter on it. Then for each blight counter on it, each opponent loses 4 life unless that player sacrifices a nonland permanent or discards a card.