If Leyline of Vitality is in your opening hand, you may begin the game with it on the battlefield. Creatures you control get +0/+1. Whenever a creature you control enters, you may gain 1 life.
When Obstinate Baloth enters, you gain 4 life. If a spell or ability an opponent controls causes you to discard Obstinate Baloth, put it onto the battlefield instead of putting it into your graveyard.
"You are the grandest of all," said the archdruid to the trees. They became so proud of bark and branch that they suffered no creature to fly overhead or perch upon a bough.
Enchant creature At the beginning of your upkeep, put a +1/+1 counter on enchanted creature. When enchanted creature attacks or blocks, sacrifice Primal Cocoon.
Trample Whenever Primeval Titan enters or attacks, you may search your library for up to two land cards, put them onto the battlefield tapped, then shuffle.
Protean Hydra enters with X +1/+1 counters on it. If damage would be dealt to Protean Hydra, prevent that damage and remove that many +1/+1 counters from it. Whenever a +1/+1 counter is removed from Protean Hydra, put two +1/+1 counters on it at the beginning of the next end step.
"Nature has grown tired of the impositions of men and will begin to outfit its creations with tools for bloody instruction." —Hadi Kasten, Calla Dale naturalist