Koskun Falls [Homelands] Wall The River Heralds would wreck

The River Heralds would wreck a thousand ships to keep intruders from finding the golden city

gain control of all creatures blocking The Wretched for as long as you control The Wretched

Set: Classic Sixth Edition Type: Artifact Creature — Shapeshifter Rarity: Rare Cost: {4} As Primal Clay enters the battlefield

Set: Kaladesh Prerelease Promos Type: Land Rarity: Rare Blooming Marsh enters the battlefield tapped unless you control two or fewer other lands

it becomes an Aura with enchant creature

Koskun Falls [Homelands] Wall The River Heralds would wreckSet: Homelands Type: World Enchantment Rarity: Rare Cost: {2}{B}{B} At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control. Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.