There are a lot of ways to open an Attraction attached to some nifty effect, along with the recursive power of Lifetime Pass Holder
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Altar of Bone Altar's Reap Arbiter of Woe Bayou Groff Betrayer's Bargain Blood Divination Blood for Bones Bone Shards Bone Splinters Burnt Offering Call for Blood Carrion Collateral Damage Corrupted Conviction Culling the Weak Death Bomb Demon of Catastrophes Desperate Plea Diabolic Intent Dusk Mangler Duty Beyond Death Eaten Alive Eldritch Evolution Endemic Plague Fiery Conclusion Final Flare Final Payment Final Strike Final Vengeance Flesh Allergy Fling Goremand Grafted Identity Heartfire Ichor Explosion Infernal Plunge Kazuul's Fury Lash of the Balrog Launch Party Lethal Throwdown Life's Legacy Mask of the Mimic Merciless Resolve Metamorphosis Mind Extraction Minion Missile Momentous Fall Morkrut Behemoth Mutual Destruction Nasty End Neoform Pyrrhic Blast Reckless Abandon Rescue from the Underworld Rite of Consumption Ritual of the Machine Ruthless Disposal Sacrifice Savage Order Scapegoat Severed Strands Skulltap Soul Exchange Spark Harvest Spontaneous Combustion Start // Finish Tend the Pests Tendrils of Despair Thud Tormented Thoughts

First, you want to make sure that the retailer is reputable
There is a lot of ramp in the deck, meaning you can build a huge mana pool quickly with cards like Khalni Heart Expedition, Font of Fertility, and Omen of the Hunt
Add in a few flicker effects to reuse your best ETB triggers once you get going, and your opponents wont know what hit them until its too late