Mt Coronet

Mt. Coronet enters the battlefield tapped with 5 historic counters.
{t}: Add {r} and remove a Historic counter.
{t} Sacrifice Mt. Coronet: Search your library for a Palkia, Dialga, or Arceus reveal it and put it in your hand then shuffle your library.

Mt. Coronet is where the Pokémon world began and is the tallest mountain in the region.