Its GX attack, Dark Mist GX , is cheap and mildly disruptive, placing one of the foes Benched Pokmon and all cards attached to it back into their hand, but there are far better GX attacks out there and this one is probably best used in an emergency where its absolutely critical rather than depending on it every game
Any time you have priority, you can turn a manifested permanent you control face up by revealing that it's a creature card (ignoring any copy effects or type-changing effects that might be applying to it) and paying its mana cost
as a result, it was forced to promise not to reprint as many cards
It can be a nice metagame option if theres a specific 2/1 or 3/1 creature thats problematic
Evasion on a commander is half the battle, and being in green opens you up to excellent Voltron pieces like Thrun, the Last Troll and Troll Ascetic