Nicol Bolas, Relentless

: Whenever a player casts a spell, put a loyalty counter on Nicol Bolas.
+2: Each player mills a card. Put all permanents milled this way onto the battlefield under your control.
-10: For each non-permanent card in a graveyard, you may cast it without paying its mana cost. If you do, copy it. You may choose new targets for it.