Mythic Proportions

Enchant creature
Enchanted creature gets +8/+8 and has trample.

Seton's Scout

Reach (This creature can block creatures with flying.)
Threshold — This creature gets +2/+2 as long as seven or more cards are in your graveyard.

Seton, Krosan Protector

Tap an untapped Druid you control: Add {G}.

Beastmaster's Magemark

Enchant creature
Creatures you control that are enchanted get +1/+1.
Whenever a creature you control that's enchanted becomes blocked, it gets +1/+1 until end of turn for each creature blocking it.

Seton's Desire

Enchant creature
Enchanted creature gets +2/+2.
Threshold — As long as seven or more cards are in your graveyard, all creatures able to block enchanted creature do so.

For the Ancestors

Choose a creature type. Look at the top six cards of your library. You may reveal any number of cards of the chosen type from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order.
Flashback {3}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)