You can afford to have the odd card, or far end of your range, under catered for
Solar Transfer lets you freely move Grass Energy around, while Jungle Dump delivers 240 damage and heals 30, making it tough to topple
In EDH, where life totals start at 40, it has an alternate job of keeping life totals low, and turning this into a 0/40 has its combo potential
Overall, Reshiram ex is an incredible finisher, and it will likely be a much-needed buff for Charizard ex
Thanks to her wording specifying "each opponent", you can benefit from Nymris' trigger up to three times per round if you happen to have enough instant speed spells and the mana to cast them
Now I have to talk about tucking