Doubtless One [Onslaught] RNR017-C It has "Sacrifice this creature:

It has "Sacrifice this creature: Add {C}

Set: Commander 2018 Type: Creature — Dragon Rarity: Rare Cost: {5}{R}{R} Flying

At the beginning of each opponent's end step

Set: Dorinthea Hero Deck Finish: Regular Type: Hero Rarity: Common Class: Warrior Life: 40 Intellect: 4 Once per Turn Effect - When your weapon attack hits

Doubtless One [Onslaught] RNR017-C It has "Sacrifice this creature:Set: Onslaught Type: Creature Cleric Avatar Rarity: Uncommon Cost: {3}{W} Doubtless One's power and toughness are each equal to the number of Clerics on the battlefield. Whenever Doubtless One deals damage, you gain that much life. "Share your devotion with me."