Rubber Duck
Thanos
The Titan's durability is considerable by biological standards. His Eternal-Deviant hybrid physiology grants him resistance to most conventional weaponry, extreme temperatures, and the vacuum of space. However, this resilience comes with notable caveats.
Thanos has been defeated, wounded, and killed across multiple documented encounters. His form, while regenerative, remains fundamentally organic and therefore subject to entropy. The stones he covets have proven more durable than their wielder—a telling observation about the relationship between power and permanence.