Your modified creatures (equipped, aura-attached, and counters) will fetch a basic land whenever they deal damage to a player
Still, if you're running a casual game, then this should be fair game
I considered U/W and U/G as possible color combinations, and I had passing thoughts about porting U/B Reanimator
Spawn-Gang Commander Three generic, two red creature Eldrazi Goblin 2/2 Uncommon Devoid (This card has no color.) When you cast this spell, create three 0/1 colorless Eldrazi Spawn creature tokens with Sacrifice this creature: Add one colorless mana. One generic, one colorless, Sacrifice an Eldrazi: Spawn-Gang Commander deals 2 damage to any target
At end of any turn or if Tombstone Stairwell leaves play, bury all of these tokens.] WHY: The Stairwell benefits from what some might call the "Llurgoyf" effect: the more graveyards there are, the more Zombie tokens will come slinging out