March of the Machine

Collective Nightmare | Instant | | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Target creature gets -3/-3 until end of turn. | Rovina Cai

Corrupted Conviction | Instant | | As an additional cost to cast this spell, sacrifice a creature. Draw two cards. | Joseph Weston

Deadly Derision | Instant | | Destroy target creature or planeswalker. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Gaboleps

Final Flourish | Instant | | Kicker—Sacrifice an artifact or creature. (You may sacrifice an artifact or creature in addition to any other costs as you cast this spell.) Target creature gets -2/-2 until end of turn. If this spell was kicked, that creature gets -6/-6 until end of turn instead. | Raluca Marinescu

Merciless Repurposing | Instant | | Exile target creature. Incubate 3. (Create an Incubator token with three +1/+1 counters on it and "{2}: Transform this artifact. It transforms into a 0/0 Phyrexian artifact creature.) | Artur Nakhodkin

Mirrodin Avenged | Instant | | Destroy target creature that was dealt damage this turn. Draw a card. | Scott Murphy

Pile On | Instant | | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Destroy target creature or planeswalker. Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) | Javier Charro

Unseal the Necropolis | Instant | | Each player mills three cards. Then you return up to two creature cards from your graveyard to your hand. (To mill three cards, a player puts the top three cards of their library into their graveyard.) | Isis

Vanquish the Weak | Instant | | Destroy target creature with power 3 or less. | Gaboleps