Isochron Scepter [The List] Sliver Eldrazi Necrons can hardness the power

Necrons can hardness the power of other dimensions

Set: The Brothers' War Retro Artifacts Type: Artifact Rarity: Rare Cost: {4} Whenever you gain life

Set: Dominaria Remastered Type: Enchantment Rarity: Mythic Cost: {2}{B}{B} Whenever a creature deals damage to you

and you may spend mana as though it were mana of any color to cast those spells

Wield your heart

Isochron Scepter [The List] Sliver Eldrazi Necrons can hardness the powerSet: The List Type: Artifact Rarity: Uncommon Cost: {2} Imprint When Isochron Scepter enters the battlefield, you may exile an instant card with mana value 2 or less from your hand. {2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.