Players will make use of the new initiative mechanic, gaining initiative on their turn to move their characters through the dungeon
Often times they can also take control of creatures, although temporarily, giving them haste and then returning them at the end of the turn (if they hadnt been removed somehow!) Green Green will be where you see the majority of your mana ramping via playing more lands, having creatures that tap for mana, or just having mana efficient creatures
The deck is built on gravefillers and payoff cards
Create a red and white creature token with those characteristics
Forests as Black Lotuses you say
Never before has the shoot em up, wagon-chasing ways of the Wild West been associated with MTG, so this is a unique change of pace for both collectors and Wizards of the Coast, who continue to buck trends by releasing unexpected MTG collaborations and exciting D&D product releases