Mega Venusaur ex has an ability called Solar Transfer that allows trainers to move grass type energy around your Pokmon in play, which means it will only take two turns to build up the 4 x grass energy cost for Jungle Dump
With the right set up, you can basically choose your win condition
It's one of the key players across multiple decks, and really puts a stop to most aggressive strategies in the format
my friend wasnt telling me to add Ulamog, the Defiler and Emrakul, the Promised End to my Rashmi, Eternities Crafter deck
If the Defending Pokmon is a Basic Pokmon, it cant attack during your opponents next turn
City in a Bottle in the maindeck can be a blowout against some strategies and the Disrupting Scepter pairs so well with CoM