Players can choose amongst four levels of difficulty - easy to extreme - that introduce variations to the rules as you crank up the pressure
You'll want to prioritize your most effective creatures whenever possible, so focus on cards like General Leo Cristophe, Sigfried, Famed Swordsman, and Gogo, Mysterious Mime
If you control three or more creatures at the beginning of your turn, all of which have a different power value, the Coven ability triggers
Time Walk is one of the strongest cards of the Power Nine, as it gives the player an entire extra turn for the measly cost of two mana
What does The Ring Card // The Ring Tempts You Card do
And frankly, considering there really isn't a budget replacement, if you're losing games because of Dockside, I could see being very annoyed by the card