Strixhaven: School of Mages

Sedgemoor Witch | Creature | Human Warlock | Menace Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.) Magecraft — Whenever you cast or copy an instant or sorcery spell, create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life." | Igor Kieryluk

Pestilent Cauldron | Artifact | | {T}, Discard a card: Create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life." {1}, {T}: Each opponent mills cards equal to the amount of life you gained this turn. {4}, {T}: Exile four target cards from a single graveyard. Draw a card. | Dan Scott

Callous Bloodmage | Creature | Vampire Warlock | When Callous Bloodmage enters the battlefield, choose one — • Create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life." • You draw a card and you lose 1 life. • Exile target player's graveyard. | Jokubas Uogintas

Codie, Vociferous Codex | Legendary Artifact Creature | Construct | You can't cast permanent spells. {4}, {T}: Add {W}{U}{B}{R}{G}. When you cast your next spell this turn, exile cards from the top of your library until you exile an instant or sorcery card with lesser mana value. Until end of turn, you may cast that card without paying its mana cost. Put each other card exiled this way on the bottom of your library in a random order. | Daniel Ljunggren