Citalpa Canopy

Citalpa Canopy protects the players first
4 battlefield creatures by adding +4/+4 to each untapped creature.
Once the target player has 4 creatures in their graveyard, Citalpa Canopy uses Treefolk Shaman abilities to exile them.
Citalpa Treefolk Shaman summons 4 cards from
the top of your library.