Drana's Emissary [Battle for Zendikar] Dryad Knight I must discover the source

I must discover the source of these strange happenings

Set: Guilds of Ravnica Type: Creature — Centaur Cleric Rarity: Common Cost: {1}{G}{W} When Centaur Peacemaker enters the battlefield

Set: Gatecrash Type: Creature — Merfolk Wizard Rarity: Uncommon Cost: {2}{U} Evolve (Whenever a creature enters the battlefield under your control

Set: Commander 2013 Type: Artifact Rarity: Uncommon Cost: {3} {T}: Add {W} or {U}

Neither player can use the unused zones in this card's column

Drana's Emissary [Battle for Zendikar] Dryad Knight I must discover the sourceSet: Battle for Zendikar Type: Creature Vampire Cleric Ally Rarity: Uncommon Cost: {1}{W}{B} Flying At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life. "The taste of freedom is sweeter than blood."