You may sacrifice a creature with a mana value of 0, such as a token creature that's not a copy of another permanent, to cast a spell for its emerge cost
When a player draws a ton of cards, things can get out of hand quickly
Traditionally it's run as a discard deck, so a turn two Bucky - Squirrel Squeak Tutor is pretty critical to take advantage of playing Floodborn characters, just like Tragic Hero
You can tell the top-down design here, where someone asked: If I design a card to be a moat, what would it look like? It might not be the most powerful, especially when decks dont necessarily need to attack to win, but its still cool and combines well with cards that enable flying
Certain cards will say cant be regenerated in their text , often to ensure a creature that they destroy stays destroyed