it can make a second attack during each Battle Phase this turn, also, if it attacks this turn, your opponent cannot activate Spell/Trap Cards until the end of the Damage Step
Japanese sets usually arrive months before international versions, placing early copies into the market when interest peaks
Lost Origin is full of ideas
Further complicating matters is that each expansion is part of a series, which also has its own code
To make the most of casualty, you'll want to fill your deck with creatures that reward you when they die, like Sinister Concierge, or tokens you have no attachment to, like decayed Zombie tokens
This design plays into its dual type's strengths and weaknesses, making it highly resistant to Electric and Poison moves, yet vulnerable to Water and Grass attacks