If the top card of your library is a historic card with a disguise or morph ability, you can't cast it face down from the top of your library with the permission granted by Crystal Skull because the resulting spell would not be a historic spell
Emerias Call / Emeria, Shattered Skyclave Run Emeria's Call in a token deck as a win condition that lets you attack with all your creatures without fear of losing any
Chuck something big in your discard, then play Chip N Dale Recovery Rangers, Maleficent Monstrous Dragon, or Triton Champion of Atlantica to stay on theme
Teferi, Who Slows the Sunset A new Teferi for a new standard
That said, a crewed vehicle can use its high power to crew another one
They were not themselves. Halmig, Order of Saint Traft Illustrated by Jakub Kasper Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp