BPhillipYork: Neat, value from discard land isn't particularly new but it's nice to have the option
Nissa bridges the gap between some mana and all the mana quite nicely, Oko holds down the fort as a turn two play to start pulling ahead, and [Card]Tireless Tracker[/Card], [Card]Walking Ballista[/Card] and [Card]Hydroid Krasis[/Card] round out the curve, threatening to quickly take over if our mana production is left unchecked while still having relevant impact if it isnt
Astrid can get pretty powerful pretty quickly if you can build up an engine that has you zapping with Ragost every turn, and once she's mighty enough to attack with impunity, she can make even more food to keep the synergy going
If the copied creature is copying something else, then Gogo becomes a copy of whatever that creature is copying, with the listed exception
Coven demands more setup than it may seem and the payoff to set this up and get an attack off without an opponent removing something is lackluster