Ulamog, the Infinite Gyre combines a cast-based answer with a threat that attacks an opponent's entire resource base. Casting it destroys a targeted permanent. Attacking triggers annihilator four, forcing the defending player to sacrifice four permanents before blocks. Indestructible then makes the large creature difficult to remove through ordinary destruction or combat damage.
The three abilities reward different stages of deployment. Ramp reaches the eleven-mana cast and its immediate removal trigger; haste helps turn the creature into a timely attack; protection against exile and bounce helps preserve later attacks. The annihilator trigger does not require damage to the player, so a small blocker cannot prevent the sacrifices once Ulamog has attacked.
Unlike Ulamog, the Ceaseless Hunger, this version destroys one permanent on cast rather than exiling two. It also shuffles its owner's graveyard into their library when it enters the graveyard from anywhere. That shuffle is a triggered ability, so there is a response window before it resolves, and it can interfere with a deck that wants cards to remain available for recursion.
Sneak Attack can put Ulamog into play with haste for an attack, but it skips the cast trigger. Casting through a large colorless mana engine provides the fuller package of value. Choose the deployment plan that matches your need: immediate permanent removal, resource pressure from annihilator, or repeated attacks. A deck should have enough acceleration and resilient follow-up to support the cost without relying on the creature being impossible to answer.
