Sure, it does see play in Modern and Commander, however, its no multi-format all-star
Since Valley Floodcaller can come down at instant speed, there is a chance that players experiment with this, but losing your enabler to the Ultima might make this a bit too resource-intensive for control decks
The majority of these cards see lots of play across a multitude of formats, so theyre worth highlighting
Boil actually does see play in Modern, in the sideboards of decks like Jund and funnily enough, its an exceptional card not just against blue decks but also against things like Four-Color Omnath, where it will still blow up a ton of opposing lands
Glistening Oil, Phyresis, Tainted Strike, and Triumph of the Hordes all fit the bill
Cavalier is also such a good blocker that I did not feel the deck needed Blue Suns to deal with creatures (Im also running Blanchwood Prowler here which helps as a chump blocker)