Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Priest of Urabrask

When this creature enters, add {R}{R}{R}.

Lotus Petal

{T}, Sacrifice this artifact: Add one mana of any color.

Culling the Weak

As an additional cost to cast this spell, sacrifice a creature.
Add {B}{B}{B}{B}.

Buried Alive

Search your library for up to three creature cards, put them into your graveyard, then shuffle.

Priest of Gix

When this creature enters, add {B}{B}{B}.

Grinning Ignus

{R}, Return this creature to its owner's hand: Add {C}{C}{R}. Activate only as a sorcery.

Recurring Nightmare

Sacrifice a creature, Return this enchantment to its owner's hand: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

Daretti, Ingenious Iconoclast

+1: Create a 1/1 colorless Construct artifact creature token with defender.
−1: You may sacrifice an artifact. If you do, destroy target artifact or creature.
−6: Choose target artifact card in a graveyard or artifact on the battlefield. Create three tokens that are copies of it.

Grapeshot

Grapeshot deals 1 damage to any target.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Harnfel, Horn of Bounty

Discard a card: Exile the top two cards of your library. You may play those cards this turn.

Birgi, God of Storytelling

Whenever you cast a spell, add {R}. Until end of turn, you don't lose this mana as steps and phases end.
Creatures you control can boast twice during each of your turns rather than once.