Nikolai, Liberty's Shield

X: Sacrifice a creature. Add X loyalty counters to Nikolai, Liberty's Shield. Use this ability Only once every other turn.
-3: search your library for a creature card with converted mana cost 3 or greater, reveal it, and put it into your hand. then shuffle your library
-13: search all libraries for up to one creature card with converted mana costs 4 or greater and put them into you hand. shuffle all libraries.