Vunrok, Spawner of Swarms

+1: Create 2 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this creature, add 1 to your mana pool"
+1: Create a 1/1 colorless Eldrazi Scion ceature token with "Sacrifice this creature, add 1 to your mana pool"
-13: Create an emblem that says "At the beginning of your upkeep, create a copy of each token you control."