Warp Artifact [Alpha Edition] Human Rogue then Combustible Gearhulk deals damage

then Combustible Gearhulk deals damage to that player equal to the total mana value of those cards

Your pieces would better serve Phyrexia elsewhere

Set: Rivals of Ixalan Prerelease Promos Type: Legendary Enchantment // Legendary Land Rarity: Rare Cost: {2}{U}{R} Whenever one or more creatures you control deal combat damage to a player

draw two cards instead

Warp Artifact [Alpha Edition] Human Rogue then Combustible Gearhulk deals damageSet: Alpha Edition Type: Enchantment Aura Rarity: Rare Cost: {B}{B} Enchant artifact At the beginning of the upkeep of enchanted artifact's controller, Warp Artifact deals 1 damage to that player.