Ygg-Ukh, Guard of the Snake

When Ygg-Ukh, Guard of the Snake enters
the battlefield, you may search your library
for up to two Dwelling cards, reveal them,
put them into your hand, then shuffle.
{2}{c}{c}, {t}, Sacrifice two Dwellingss: Create
a 5/5 colorless Horror creature token named
Zath's Shackle with “This creature can't be
blocked by creatures with power 1 or less.”