Axalt, Slithering Liege

Trample
When Axalt, Slithering Liege enters the battlefield, put X +1/+1 counters on each creature you control, then search your library for X deserts and put them onto the battlefield tapped. Shuffle your library.
{x}{x}{b/g}, {t}: Sacrifice a desert. Regenerate X target creatures with +1/+1 counters on them.