pokemon xy base booster box Set which means they cant attack that turn Pokemon XY Base Set Booster

Consult the Professional Sports Authenticator (PSA) and get an estimate

However, in order to play her or use her buff, my deck must contain creature cards of only these types - adding a human soldier would disqualify me

But it's also true that people can use Encroaching Mycosynth to make the battle an artifact, then The Blackstaff of Waterdeep to make it a creature, then Arcane Adaptation to make it a Human, then Moonmist to transform it, and because of the changes to DFC token rules introduced for Incubator tokens, that token would then transform

Played in green based control decks where blue or black card draw in unavailable or sometimes in explosive elf mana style green decks

Guzzlord ex seems way more interesting