Marshadow is great to put into the active spot right after Druddigon (or any of your Pokemon) has been knocked out, because if they have the two Energy needed for their attack, they can deal 100 damage to the opposing Pokemon
During your opponent's turn, except the turn this card was sent to the GY, if you have no cards in your hand: You can banish this card from your GY
The ideal scenario is to start using the Leader effect at turn 4, and through Black Moria s Ramp effect, we gain back the returned Don, making sure we continue the pressure on upcoming turns
If it enters at the same time as a Plains or Island when you control no other Plains or Islands, it will enter tapped
And if theres one thing green is good at doing, its pumping mana into things