Crater Hellion [Urza's Saga] Amonkhet Prerelease Promos Set: Urza's Saga Type: Artifact

Set: Urza's Saga Type: Artifact Rarity: Uncommon Cost: {3} Worn Powerstone enters the battlefield tapped

but my host would casually push it down before I could make out what it was

The priest cast Xantcha to the ground

Set: Alpha Edition Type: Instant Rarity: Common Cost: {1}{B} Destroy target nonartifact

Tibalt Type: Creature — Nightmare Horror Rarity: Common Cost: {1}{B} When Mesmeric Fiend enters the battlefield

Crater Hellion [Urza's Saga] Amonkhet Prerelease Promos Set: Urza's Saga Type: ArtifactSet: Urza's Saga Type: Creature Hellion Beast Rarity: Rare Cost: {4}{R}{R} Echo {4}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When Crater Hellion enters the battlefield, it deals 4 damage to each other creature.