This combo is meant to be played on multiple turns, as Demonic Pact requires the player who controls it to choose one of four different options, one of which reads "You lose the game." What follows is that players need Harmless Offering to cede control of Demonic Pact, but only after the first three options have been used in order to have the opposing player get the Enchantment with no other option but to lose the game at the start of their turn
Of course, if you are the only one with a 'counters matter' deck, you will gain the most from this effect
But Daretti, Scrap Savant locked in Red as this clever, intuitive, sacrificial pro-artifact color on the lines of Goblin Welder, Bosh, Iron Golem, and Trash for Treasure
I posted my Delina, Wild Mage decklist in the Luxury Suite channel on the PlayEDH Discord server, asking for feedback and cards that I might have overlooked
Prowess and cost reduction together make storming off much easier, and the double strike trigger goes a long way towards finishing off your opponents