A-Core, Apex Refined

Protection from white, blue, red,
{x}{b}{t}: Target permanent or planeswalker
gets -X/-X until end of turn.
{x}{g}{g}{t}: Return X number of cards from your graveyard to the top of your library, if more
than three put them into your library then
shuffle.
{2}{b}: Return A-Core, Apex Refined from
the graveyard to your hand.