mtg artifact mill cards New Combo dropping with an upcoming Edge of Eternities card 🌌👀 Singularity Rupture to wipe the board and mill half your opponent's deck 😎 Then use the Exhaust ability of Riverchurn The Gathering Sands of Delirium | Magic:

Especially in sideboarded games, the fact that Eidolon of Countless Battles comes back as a creature is pretty relevant against black decks with access to Devour Flesh

Again, choose the player with the mana screw as they'll get temporary ramping and they can scry for lands

Captain Howler's stat boost can become massive to certain creatures to deal large chunks of damage

Black-Green Graveyard Value Stock up your graveyard with permanent cards to supercharge your spells

The serving suggestion is to pair this with squirrels, but any way you outnumber their blockers by two to four creatures turns your attack into lethal