Avengers: Infinity War2018

[Dr. Stephen Strange recruits Tony Stark to the New York Sanctum, and he with Bruce Banner and Wong explain Thanos' plan to acquire the Infinity Stones]

Tony Stark:
Tell me his name again.

Bruce Banner:
Thanos. He's a plague, Tony. He invades planets, he takes what he wants, he wipes out half the population. He sent Loki. The attack on New York, that's him!

Stark:
[to himself] This is it....What's our timeline?

Banner:
No telling. He has the Power and Space Stones, that already makes him the strongest creature in the whole Universe. If he gets his hands on all six Stones, Tony...

Dr. Stephen Strange:
He could destroy life on a scale hitherto undreamt of.