Hypnotic Specter, the hippy as it was known, was always a great first turn play in conjunction with Dark Ritual
1 Heliod, Sun-Crowned Is The God Of Historic Heliod, Sun-Crowned is a legendary enchantment creature and a god
Tectonic Giant and Valakut Awakening are two other options that can easily fit into any red deck that needs more card draw
Goblin Welder gets away with not reaching his full abusive potential because he is only one mana
Dark Depths: With Thespians Stage and Vesuva in the deck, Dark Depths is even more easily able to create a 20/20 Merit Lage token that is indestructible and flying
Add in discard outlets like big creatures with Cycling (which you can grab back), Golbez, Crystal Collector's own Surveil ability, and old classics like Bottomless Pit, and we've got a nasty little engine here