Meek Vs. Mighty

When Meek Vs. Mighty enters the battlefield,
search your library for a card with converted
mana cost X or less, reveal it, and put it into your
hand. Shuffle your library.
Only one creature may attack each turn.
Only one creature may block each turn.
{x}{r}{w}, {t}: Target creature gets -X/+1 until end
of turn, and a target creature gets +X/-X until
end of turn.
"Don't give me the 'It's not fair' excuse. You know perfectly well what the consequences for treason are."