The problem is finding more playtest cards
EX and GX cards push the boundaries of play, just like Z-Moves do, by giving you a stronger version of your favourite Pokmon
Radiant Lotus While it does cost six mana, it seems extremely easy to go mana-positive with this card and take an absolutely massive turn by sacrificing artifacts that you dont need in order to create a massive amount of mana
This meant that Venomoth, in theory, could change its typing to suit the defending Pokemons weakness every turn, again, as long as that type is in play
Peri Brown might help him out, or work well in a go-wide strategy, as she gives one Historic spell a turn Convoke
Overall, Manaphy functions the same way a Moltres ex would in a Charizard ex deck, though they lack any damaging attacks