The one on the left is the most common version that youll find in the Obsidian Flames set, and the one on the right is one of the scarcer, full art variants of the card
Lillies Clefairy ex, for example, has 190 HP and high damage potential
Coalstoke Gearhulk Menace and deathtouch are mean, and as long as you get a creature with 2 power, Coalstoke Gearhulk can easily take out four opposing creatures
As a fairly new inclusion in the Pokemon TCG, this subset of cards has a lot of time to make its mark, and might garner more hype or fall out of favor as a 'flavor of the month' kind of card
If this card attacks, it is destroyed at the end of the Battle Phase
If a monster(s) is Normal or Special Summoned, and is now pointed to by an opponent's Link Monster (except during the Damage Step): You can Tribute this card