It isnt ground-breaking by any means, but its a solid game piece for a Golgari deck running dredge or other self-mill tactics
In Multiplayer formats it grabs something from each of your opponents, so not only do you take away their blockers, or similar, you then get multiple hasty annihilators for only 7 mana
Think of it like tapping or untapping
Having resources at hand is crucial for the Deck, and it doesn't hurt to pressure the opponent to punish them for Special Summoning and searching cards
The difference here is that emulation allows a few benefits that expedite some of the slower (more grindy) aspects of the experience
He was a massive problem for Yugi to overcome, as his Millennium Eye essentially allowed him to cheat in every duel he competed in, as he was able to see his opponent's hand