Flying (This creature can't be blocked except by creatures with flying or reach.),
trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Humans you control get +1/+1.
Coven — Whenever Sigarda attacks, if you control three or more creatures with different powers, look at the top five cards of your library. You may reveal a Human creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.