Charon, Ferryman of the Dead

Indestructible
Whenever Charon, Ferryman of the Dead or
another skeleton you control regenerates
or returns to your hand from a graveyard,
search your library for any card with a converted
mana cost up to two greater than the mana
cost of that skeleton and put it onto
the battlefield. Then shuffle your library.
{1}{b}{b} Regenerate Charon, Ferryman
of the Dead