Nissa, Worldwaker, although a little slower than Xenagos, operated in a very similar way
Alistair, the Brigadier makes legendary soldiers in Bant a thing
It was mentioned a while ago on a official sell sheet that several "Special Art cards" would come, that would show off the Pokmon's uniqueness, and would have made sure to make pack openings even more exciting
According to TCGPlayer's Mega Evolution pull rate data, these "Mega Hyper Rare" cards (what a bizarre rarity name by way) on average only appear one in every 1 out of every 1260 packs of Mega Evolution
RD/SD0A-JP007 Soul Drake Level 4 DARK Dragon Effect Monster ATK 1100 DEF 600 [REQUIREMENT] During the Main Phase this card is Normal or Special Summoned, send 2 face-up Level 4 or lower Effect Monsters you control to the GY [EFFECT] Choose 1 Level 8 LIGHT Dragon monster in your GY and Special Summon it to your field face-up, but during this turn, you cannot attack with Level 7 or lower monsters