If it survives a turn cycle, it can always untap up to seven lands on its own, though it's nice that you can keep it out of combat, if you prefer to have your 7/5 trampler on defense for some reason
Vintage card prices tend to be more stable and trend upward over long periods, though they're not immune to market-wide dips
This card seems absolutely horrible at first glance, so I can understand your hesitation
Item Caddy: Parallel version of Agnes is built around heavy usage of Spells, particularly events: She can, while upgrading Spells and Occult cards, keep both the old and new versions of the cards in her deck, allowing her to sidestep the usual rule of "no more than 2 copies of same-title card in the deck", and thus improving the utility she can get from the cards with those traits
The color and lighting choices here give this card a visual distinction from the other expensive Neo Destiny cards, but its unusual appearance isn't enough to push Gengar into the top tier