See, Xantcha is not, it turns out, the only Xantcha
The first ever McDonald's TCG collection was released in 2010 and included twelve cards
You can either go with the Judge route to fulfill the condition or simply go with Meganium to bypass the high energy cost
The Power Nine are a relic of a brief time when card design was unfettered by concerns of balance against other sets, and their abilities are truly exceptional as a result

Shards of Alara 1/1 Saproling - my favourite token artwork Innistrad 2/2 Wolf - Judge promo token (looks exactly the same as the regular Wolf from the front, but it has a judge promo ad on the back) Friday Night Magic 1/1 Human - Avacyn Restored full moon promo Friday Night Magic 2/2 Wolf - Avacyn Restored full moon promo Avacyn Restored 4/4 Angel - the Helvault Experience / Pre-Release foil promo Avacyn Restored 5/5 Demon - the Helvault Experience / Pre-Release foil promo M13 1/1 Goblin - league promo Return to Ravnica 2/2 Knight - league promo Return to Ravnica 3/3 Centaur - judge promo Gatecrash 1/1 Soldier - league promo Dragon's Maze 1/1 Bird - league promo Dragon's 10 Maze guild promos M14 1/1 Silver - league promo Theros 3/3 Golem - judge promo Theros 1/1 Soldier - league promo Born of the Gods 1/1 Soldier - league promo
That said, with the 20-card deck limit and so many great supporters, it's getting harder and harder to find room for cards like this