Just as in Draft, the strength of a creature is completely dependent on the other creatures in the format
On the battlefield, all of your discard and sacrifice effects become amazing
At the beginning of your end step, if you sacrificed a Food this turn, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle
Like most Pokmon cards, the value of Charizard V depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Brilliant Stars)
This can be an incredible amount of damage to do, even if it can't knock out Pokemon directly
Many players are even willing to spend real money to collect them