Grave Strength [Fate Reforged] SPA Rio serpenteante or it will make one

or it will make one

Each Stormscape apprentice must hand-raise and train an owl before attaining the rank of master

Set: Commander 2011 Type: Legendary Creature — Giant Warrior Rare Cost: {2}{R}{W} Lifelink {R}

Dragons Type: Basic Land — Mountain Common Cost: ({T}: Add {R}

And it's definitely something to worry about

Grave Strength [Fate Reforged] SPA Rio serpenteante or it will make oneSet: Fate Reforged Type: Sorcery Uncommon Cost: {1}{B} Choose target creature. Put the top three cards of your library into your graveyard, then put a +1 +1 counter on that creature for each creature card in your graveyard. So long as death follows life, the supply lines of the Sultai will never be cut.