Ivory Tower (Preston Poulter) (SB) [Pro Tour Collector Set] Fifth Dawn Sacrifice a Goblin: Destroy target

Sacrifice a Goblin: Destroy target artifact

sacrifice Helm of Obedience and put one of them onto the battlefield under your control

Set: Unlimited Edition Type: Enchantment Rarity: Rare Cost: {R}{R} At the beginning of each player's upkeep

They just know

When Snapcaster Mage enters the battlefield

Ivory Tower (Preston Poulter) (SB) [Pro Tour Collector Set] Fifth Dawn Sacrifice a Goblin: Destroy targetSet: Pro Tour Collector Set Type: Artifact Rarity: Rare Cost: {1} At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4. Valuing scholarship above all else, the inhabitants of the Ivory Tower reward those who sacrifice power for knowledge.