Overall, multiple colors have ways to profitably interact with Waterfall Aerialist without needing to cast instant or sorcery spells to target it
At first blush its similar to Angry Hermit decks hoping to dump their library into the graveyard with Hermit Druid, but this one has some alternative play patterns that make it a tricky deck to play against
Ulaleks multicolored hybrid cost fixes the flaws that come from putting an Eldrazi titan in the command zone, and it provides a solid payoff for your Eldrazi with its triggered abilitythough I suspect that could do little to nothing and still be so strong
Collective Inferno Damage doublers get especially dangerous when they empower noncombat damage like with bite spells or pingers
Hellkite gets flashed into play, rips apart board positions, sometimes sending damage straight to the face, and then might even get a swing in
Countering their spells won't matter since the ability triggers upon casting