A Glacial Chasm being played on your opponents board shouldnt mean youre now entirely out of the game, and your opponents definitely dont need to untap with their Nykthos, Shrine to Nyx too often either
Its a really cool sea creatures deck, but its a lot slower to get going than some of the other options available in blue or Simic decks
Invasion of Gobakhan / Lightshield Array The problem with battles is that they often take away from your curve and your pressure on opponents
Doubt At the beginning of your end step, you may return a nonland permanent you own to your hand
The well-documented crash of baseball cards in the 1980s, brought on by overzealous producers, is a cautionary tale
And to close, theres also an online ladder for those that want to put their creations to the test