Mechanically, he represents his video game counterpart perfectly
In Saga draft, it was a neat trick with Horseshoe Crab, creating what was known as "the Machine Gun." In Odyssey Block, it was said that if you didn't have at least one Psionic Gift in your white-blue deck, you didn't have a good white-blue deck
And then Zegana has massive synergy with +1/+1 counters and enters-the-battlefield tricks, both of which are pretty common in these colors
Man-o-War is excellent against aggro, midrange, and Cloudshift and Zombify shenanigans, but awful against control and likely too slow for Horseshoe Crab+Quicksilver Dagger combo
Getting Clone tokens is awesome
Sneaky opponents can mislead you with what they show in a Blackmail