I could be wrong here, but I would be very happy playing three of this card in any B/R/X strategy, and especially so if I were playing with an aggressive slant to my deck
Lilah, Undefeated Slickshot Lilah, Undefeated Slickshot plots Slick Sequence for you, as well as Lightning Helix and Sacred Fire if you expand your colors
The card is so scarce that it barely has a stable market value since sales happen so rarely
Rarity, condition, grading, market demand, and recent sales all play important roles in determining value
The deck doesn't run slow and fragile removal spells like Glass Casket and Conclave Tribunal
These are not considered separate species of Pokmon, but variations of existing ones