Search your library for a land card and put that card onto the battlefield tapped with a venom counter on it. It gains “Whenever this land is tapped for mana, you lose 1 life.” Then shuffle.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) When Poisonheart Undead enters, you draw a card and you lose 1 life.
When Poisonous Growth enters, create a 1/1 green Saproling creature token, then attach Poisonous Growth to it. Equipped creature has deathtouch. Equip {4}
When Polgek Artisan enters, create an X/X colorless Juggernaut artifact creature token, where X is the number of artifacts and enchantments you control.
Whenever Polgek Songcrafter attacks, other attacking creatures you control get +1/+0 until end of turn. If you control five or more attacking creatures, choose up to one target creature the defending player controls. That creature can't block this turn.
[+1]: Create a white enchantment token named Intangible Virtue. It has “Creature tokens you control get +1/+1 and have vigilance.” [–3]: Create a 4/4 white Angel creature token with flying. You gain life equal to the number of tokens you control. [–5]: Exile all other nonland, nontoken permanents.
When Polluted Servant enters, target opponent loses 1 life and you gain 1 life. {2}{U}: Exile Polluted Servant, then return it to the battlefield tapped under your control.
When Polytheism enters, return up to four target permanent cards not named Polytheism from your graveyard to the battlefield. They become 4/4 God creatures in addition to their other types. Gods you control have indestructible.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever you cast an instant or sorcery spell, up to one other target creature has base power and toughness 0/2 until end of turn.