Its easy to discount the value of the death trigger, however
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Water Crystal's first ability)
Will Scourge of the Skyclaves die, because it doesn't have the ability and is a 0/0 or does it immediately becomes a 1/1 to stay alive
Tatyova, Benthic Druid Tatyova, Benthic Druid helps what every EDH deck (and Brawl) wants to do: play lands, draw cards, gain life
The problem, of course, is that theyre strictly worse than Unknown Shores, which is hardly a staple
If cascade allows you to cast a split card, you may cast either half but not both halves.