As an avid legacy player who's been playing legacy since 2010, I have to disagree.
Legacy players suck at combat. They suck at declaring proper attacks, they suck at declaring proper blocks, and they suck at accounting for on-board tricks. Legacy is a very "from the hand" format, where your opponent's hand is typically what you're playing around. They usually have a very obvious delver/griselbrand/thespain's stage/whatever on the field, and their hand is what you have to consider. If they have a Force of Will, if they have a Daze, when they Brainstorm you have to estimate how many cards they've seen, the chances of them drawing removal, all these sorts of things.
As a result, Legacy players generally have under-developed combat math and combat experience. They're too used to play with and against True Name, Emrakul, and stuff like that. Legacy players mess up and make mistakes if you start actually making them interact with the board, and start declaring blockers.
I've won games 'for free' from my opponent just making egregious errors regarding basic combat math, that I am confident a limited/standard/modern aficionado would not have made. Stuff like attacking into a Jitte and then frowning when I have 2 Jitte counters, stuff like swinging with both True Names and then frowning when my crack back is lethal, stuff like this. They just aren't used to it. It's not their element. >>61885951
Sure. He's a bit expensive, but if you cast lots of Terminus and Supreme Verdicts to the point where you get to cast him, he'll probably make you win. Check out Torrential Gearhulk for another big blue guy with a cool ETB effect.