Witchlight Point

{u}, Discard a Sorcery or Instant card: Witchlight Point becomes a 4/4 blue Serpent creature with Islandwalk until end
of turn. It's still a land.
{t}: Add {u} to your mana pool for each Sorcery or Instant in your graveyard.
Whenever Witchlight becomes tapped, sacrifice it unless you discard a Sorcery or Instant card.