This artwork looks really solid and its got a pretty insane attack/HP combo for just a basic Pokemon
The game expects you to ramp into this attack with cards like the Baby Pokmon (whose attack attaches Energy to your bench for free) and Ho-oh ex (whose attack generates exactly the three Energy types needed by Lugia), since the game's random Energy generation means that just being able to use it once without these effects is a pipe dream at best, and only getting it off a single time probably won't even win the game
Once you are casting spells for free, cascading into more spells, and refilling your hand, it becomes very hard for opponents to stop the snowball
The reminder text says what it does, but just for reference, when this card enters, you may sacrifice any number of creatures
Pokemon Card Top Loaders Once your cards are sleeved, the next level of protection is something referred to as a top-loader