Sliver Overlord [Scourge] Juggernaut Ally of Zendikar becomes a

Ally of Zendikar becomes a 5/5 Human Soldier Ally creature with indestructible that's still a planeswalker

if two Goblin Warriors and a Goblin Shaman are on the battlefield

At the beginning of each player's upkeep

You control enchanted creature

you may tap or untap target permanent

Sliver Overlord [Scourge] Juggernaut Ally of Zendikar becomes aSet: Scourge Type: Legendary Creature Sliver Mutant Rare Cost: {W}{U}{B}{R}{G} {3}: Search your library for a Sliver card, reveal that card, and put it into your hand. Then shuffle your library. {3}: Gain control of target Sliver. (This effect lasts indefinitely.) The end of evolution.