Like most Pokmon cards, the value of Flygon 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)
The other categories (win conditions and card advantage) usually boil down to playing the best we have available
Lightning Skelemental, a devastating combination of Ball Lightning and Blightning, presents an incredibly aggressive card that may be aggressively costed enough to see play in Modern
For example, if you control Tangle Wire and an opponent taps an untapped creature they control as part of the resolution of Tangle Wire's triggered ability, Sharae's ability won't trigger
It costs an effective 4 mana to activate, and it only taps for colourless