Grand Arbiter Augustin IV [Modern Masters] Battle for Zendikar Prerelease Promos you may reveal the top

you may reveal the top four cards of your library

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant land

At the beginning of the end step

Set: Legends Type: Legendary Creature — Shapeshifter Rarity: Rare Cost: {1}{W}{U}{B} At the beginning of your upkeep

Grand Arbiter Augustin IV [Modern Masters] Battle for Zendikar Prerelease Promos you may reveal the topSet: Modern Masters Type: Legendary Creature Human Advisor Rarity: Rare Cost: {2}{W}{U} White spells you cast cost {1} less to cast. Blue spells you cast cost {1} less to cast. Spells your opponents cast cost {1} more to cast. The Arbiter is a conduit of justice, a will so disciplined that it dispenses justice without ego or remorse.