Most of the things I have designed that I think would benefit the cube are cheap card quality cards and removal
There are also strong combo-style lines with Thornbite Staff, Ashnod's Altar, and Staff of Domination, and token loops around Krenko, Mob Boss that can spiral into game-ending damage
Commander Zinnia, Valley's Voice Flying Zinnia gets +X/+0, where X is the number of other creatures you control with base power 1
Eight lands in play is the break-even point where you can cast this for free, though you could always run it out earlier, hope it sticks around for a turn cycle, and untap with something like 10 to 12 mana from lands alone
Manufacturer: Wizards of the Coast Bravery comes in all sizes
Earlier that day I had picked up a copy of Fate Transfer and I was able to use it to move 24 +1/+1 counters from an opponent's Managorger Hydra onto one of my creatures, give it infect with Phyresis and hit it with Chandra's Ignition