Once A Planeswalker

Split Second, Painborn, Cascade & Limbo
{x}: Flip this card face down as a copy of any Planeswalker from outside of the game with
a different name of one you've already used.
If destroyed flip this card up & create a Lore Stone. (X is said Planeswalker's mana cost)
{2}{p/c}{p/c}Rising Tide