You can obtain the Mew ex (Crown rarity) card by opening Mew from Mythical Island set
The effect is worth it at the beginning of most games
Repeatedly recycling counters to summon an overwhelming stream of powerful beasts
Cathar Commando Cathar Commando is good not because its the strongest or most game-changing card, but because its a great utility card
Starting Hand?: Prismatic Vista, Windswept Heath, Myriad Landscape, Soul's Attendant, Generous Gift, Lightning Greaves, Folk Hero Forgot to snap a picture of my starting hand but I think it was something like that
These factors meant that Exploit was reasonably strong and not too hard to build a deck around, but there wasnt so much support that it was easy to do multiple times in a game or always worthwhile