I base my choice to include a card in the cube based on how much it gets played

Aggressive Mammoth Akroma's Memorial Altar of the Goyf Archetype of Aggression Arlinn, Embraced by the Moon Avatar Kyoshi Badgermole Bloodcrusher of Khorne Brawn Case of the Trampled Garden Centaur Chieftain Chronicle of Victory Domri Rade Ellywick Tumblestrum Embodiment of Fury Emil, Vastlands Roamer Ferocity of the Wilds Frostcliff Siege Full Moon's Rise Garruk's Uprising Garruk, Cursed Huntsman Giant Ankheg Gimbal, Gremlin Prodigy Groundshaker Sliver Gruul War Plow Jetmir, Nexus of Revels Kamahl, Heart of Krosa Khenra Charioteer Kobold Drill Sergeant Kodama of the West Tree Krang, Utrom Warlord Leonardo, the Balance Maul Splicer Maze Behemoth Neck Breaker Nev, the Practical Dean Nylea's Forerunner Nylea, God of the Hunt Old One Eye Orcish Siegemaster Overrun Overwhelming Stampede Paragon of Eternal Wilds Pathbreaker Wurm Pheres-Band Warchief Primal Rage Proud Wildbonder Rageblood Shaman Red XIII, Proud Warrior Roar of the Fifth People Roughshod Mentor Sabertooth Outrider Sphere Grid Stampeding Elk Herd Street Riot Sunrise Sovereign Surrak Dragonclaw Surrak and Goreclaw Tanazir Quandrix Temperamental Oozewagg The Very Soil Shall Shake Thornfist Striker Thunderfoot Baloth Towashi Training Regimen Ulvenwald Behemoth Vivien Reid Yuna, Hope of Spira

Click here to see the Planeswalker-stamp reprints The Secret Lair Party Starts on May 12, and Everyone's Invited
This way, we use our mana fully each turn, and we have something we can do later to help ourselves
Since launch, players have been able to live out their mobile Pokemon collecting dreams, being able to open packs, make decks, and battle other players
If you wanted to tone it down a lot, you could drop out the combo lines and Craterhoof, load in a bunch of old Fungus cards and play some good old fashioned low-power EDH