Artifact Creatures you control get +1/+1 and have flying and indestructible
With an Ink cost of 3, 2 Strength, 3 Willpower and 1 Lore, Ursula doesnt look great at first glance
Nissa's Revelation is another excellent way of drawing tons of cards in Stompy decks up there with Life's Legacy (though Greater Good shall always be king)
Burning of Xinye + Wildfire Again, nobodys going for Bust (that comes later)
From the lofty rares and mythics of the Fellowship of the Ring, down to uncommons that might include Grimbold, Beregond and Haldir, theres a wealth of characters to draw from
Then, if you want a more objective ranking, you can visit EDH REC and simply sort the Birds category by most played