Its ability looks pretty insignificant at first but combined with certain cards, it can help you produce infinite mana, buff your creatures with a gazillion counters and draw at the same time, or even have infinite turns
Misty's Staryu #90Common $1.67 Misty's Staryu #92Common $1.75 Misty's Staryu #46Common $0.12 Misty's Staryu #23Common $0.11 Staryu #65Common $0.71 Staryu #65Common $1.71 Staryu #95Common $0.52 Staryu #56Common $0.64 Staryu #20Common $0.15 Staryu #75Common $0.38 Kangaskhan #47Rare $0.24 Gyarados GX #16Ultra Rare $5.52 Jynx #30Uncommon $0.12 Ekans (26) #26Common $0.21 Onix GX #36Ultra Rare $3.09 Blaine's Last Stand #52Rare $0.22 Golem #35Rare $0.31 Mr
Some of them are as likely to put a blade in you as greet you, so it may be best to heed my advice
In the Pokemon TCG, a VSTAR card is a token used to keep track of when a VSTAR Power is used by players
"The MODO Fiasco: Corporate Hubris and Magic Online"
Kain is a good early play that can guarantee you the top-ups you need, and you can do some dastardly things with him, like building him tall and strapping a Vampiric Link to him to ensure you gain life off of anyone attacking with him