What simpler way is there to accomplish that goal than to bring in the perfect answers for your opponent's threats
She had been born of them, once, when she was made by Oona, before she had taken on the shape and memory of Maralen of the Mornsong, whose name she still carried
(Hint: it's Magic slang for an ability you're probably familiar with.) Sound good
This should be based entirely on what the opponent is doing, but more than likely Id probably cast the Sylvan, knowing that if its dealt with I have a backup copy, and if its not, will lead to finding more mana and gas
While other generic black mana board wipes like In Garruks Wake can take out every opponents board and leave yours standing, sometimes you dont have the Creature power to swing for the win right away