Demon of Fate's Design (Extended Art) [Commander Masters] Kithkin Soldier Set: War of the Spark

Set: War of the Spark Type: Sorcery Rarity: Rare Cost: {2}{U}{U}{B} Enter the God-Eternals deals 4 damage to target creature and you gain life equal to the damage dealt this way

Shatterskull Pass is a pretty distant second

Set: Game Night: Free-for-All Type: Creature — Elf Druid Rarity: Rare Cost: {1}{G}{G} Other Elf creatures you control get +1/+1

Set: Streets of New Capenna Commander Type: Artifact Rarity: Rare Cost: {3} If you would copy a spell one or more times

" —Greenweaver Mina

Demon of Fate's Design (Extended Art) [Commander Masters] Kithkin Soldier Set: War of the SparkSet: Commander Masters Type: Enchantment Creature Demon Rarity: Rare Cost: {4}{B}{B} Flying, trample Once during each of your turns, you may cast an enchantment spell by paying life equal to its mana value rather than paying its mana cost. 2B, Sacrifice another enchantment: Demon of Fate's Design gets +X +0 until end of turn, where X is the sacrificed enchantment's mana value.