The ability to combine various cards facilitates your ongoing development, bolstered by two complimentary booster packs each day
Dragonspark Reactor Too durdly for Standard, Dragonspark Reactor is a nice quiet threat that's cheap enough to just sac as needed for your other synergies if its not going to work out
It's one of red's best win conditions, and with the mono-red payoffs for EDH, there are so many ways for this card to do broken things
Coupled with the balance in the current metagame making more decks than ever a viable strategy for competitive glory, it gives players the remit to play just about anything provided they have the strategy and skill to upset and overcome an opponent
A 6/6 indestructible creature for with an ability attached sounds good to me
But even without Lysandre by its side, the item lock was still too powerful and Seismitoad was a vital part of the metagame until it rotated out of the Standard format