Harmonic Sliver [Time Spiral Remastered] Special Set: Double Masters 2022 Type:

Set: Double Masters 2022 Type: Enchantment Rarity: Rare Cost: {W}{B}{G} When Abzan Ascendancy enters the battlefield

or if it's just a special card for MagicCon Philadelphia

Set: Jumpstart 2022 Type: Artifact Creature — Assembly-Worker Rarity: Common Cost: {5} When Self-Assembler enters the battlefield

double the number of +1/+1 counters on that creature

" —Bilbo

Harmonic Sliver [Time Spiral Remastered] Special Set: Double Masters 2022 Type:Set: Time Spiral Remastered Type: Creature Sliver Rarity: Uncommon Cost: {1}{G}{W} All Slivers have "When this permanent enters the battlefield, destroy target artifact or enchantment." "Since the last sliver arrived, even our mightiest relics splinter into shards as soon as we bring them against the hive." Llanach, Skyshroud ranger