They are more flexible than Treasure Cruise, are awesome in Simic Ramp with Cultivate stuff from Green or Izzet Spellslinger with Treasure makers for things like Guttersnipe or Dimir with Coffers and Urborg or with mono-Blue Nykthos, Shrine to Nyx
For another, theres a subtle intimation that Lady Tremaines Floodborn incarnation is perhaps a vampire
With such high-power attackers, this deck will skyrocket your life total, allowing you to go wild with abilities that cost life
Flicker effects are another great way to extract even more from your ETB creatures
Interestingly enough, if Ice Cauldron gets destroyed while it has a card attached to it, you can still play that card as though it were in your hand
Spreading Seas really shines brightest in flicker strategies: you can reselect the land its targeting by flickering it with Brago, King Eternal and draw an additional card, for example