The 'Grey'test Dinomancer

Received Greybough as my free legendary, so I figured I would come up with some janky meme combo to do with him. This deck's goal is to make a board full of Greyboughs that will chain deathrattles to essentially make never-ending 4/6 taunts akin to the warlock combo with Cruel Dinomancer which the name of this deck pays tribute to, but ya know, with taunt.

The combo is to get to 10 mana, then play Spiritsinger Umbra then Greybough, then 2 Lightning Bloom and Carnivorous Cube the Greybough resulting in either Umbra or Greybough getting the deathrattle to summon a Greybough, Cube killing Greybough which will give Umbra or Cube the deathrattle to summon a Greybough, then summoning 2-3 more Greybough from Cube's deathrattle activating which also give out 2 more deathrattles that will summon Greybough. If the opponent manages to deal with that wave there is also Hadronox to summon another wave of Greybough and N'Zoth, the Corruptor to do it again!