At the start of the Damage Step, if this card attacks and you have "Sky Striker Ace - Raye" and "Sky Striker Ace - Roze" in your GY: You can destroy all monsters your opponent controls
Sephiroth, Fallen Hero sets your modified creatures to beefy 7/5s at base when he swings, which is fantastic if you manage to go wide
Two years ago, a deck that was very dominant in the competitive scene was the Brilliant Monarchs deck and apparently this card found a spot there to shine as the Deck was in need of a level 5, light vanilla monster that was preferably fairy (because of some Darklord shenanigans that you could face)
Glaceon ex has the following abilities: Snowy Terrain: During Pokmon Checkup, if this Pokmon is in the Active Spot, do 10 damage to your opponent's Active Pokmon What attacks does Glaceon ex have
If you build your Commander deck right, you probably won't be using that fourth ability very often
These were a little more divisive than the other alternate art cards: some players adore them, whereas others dont quite vibe with them