Karlach, Fury of Avernus gives extra combats along with Aggravated Assault, Relentless Assault, and World at War (the last of which has rebound to cast again for free the next turn)
Thats a solid amount of reliability, and it can see you through

Rhys the Redeemed -- Commander | Stephen Johnson Creatures (21) 1 Arbor Elf 1 Avacyn, Angel of Hope 1 Avacyn's Pilgrim 1 Avenger of Zendikar 1 Bramblewood Paragon 1 Champion of Lambholt 1 Craterhoof Behemoth 1 Dragonlord Dromoka 1 Druid of the Cowl 1 Grand Abolisher 1 Imperious Perfect 1 Jagged-Scar Archers 1 Jazal Goldmane 1 Leaf Gilder 1 Mirror Entity 1 Regal Force 1 Seedborn Muse 1 Seeker of Skybreak 1 Spawnwrithe 1 Voyaging Satyr 1 Wellwisher Planeswalkers (1) 1 Huatli, Radiant Champion Instants (5) 1 Harrow 1 Rootborn Defenses 1 Seedtime 1 Swords to Plowshares 1 Teferi's Protection Sorceries (11) 1 Cultivate 1 Fumigate 1 Harmonize 1 Rampant Growth 1 Rout 1 Shamanic Revelation 1 Slaughter the Strong 1 Tempt with Discovery 1 Tooth and Nail 1 Triumph of the Hordes 1 Wrath of God Enchantments (13) 1 Anointed Procession 1 Beastmaster Ascension 1 Concordant Crossroads 1 Darksteel Mutation 1 Doubling Season 1 Ghostly Prison 1 Instill Energy 1 Lignify 1 Parallel Lives 1 Presence of Gond 1 Privileged Position 1 Sandwurm Convergence 1 Zendikar Resurgent

They offer an elegant unboxing, and arrive at roughly the same price point that Secret Lair drops did
The other Standard dominant deck removed White for Armageddon effects and then added the enchantment of Awakening in Simic only
Graded Population Report: Butterfree #33 Visualize the distrbution of grades in the chart