The synergies with surveil in Ravnica Allegiance helped too
When Neriv attacks, you get to exile cards from the top of your deck equal to the number of differently named tokens you control
Your opponent may not leave exerted characters out for him, or only exert characters with high willpower but there are workarounds
[8] In practice, Blue had a significant head-start on Green, which got none in the earlier sets, with White getting its first treasure maker two years later in Smothering Tithe
Other win conditions include burning everyone out of the game, either with Mirkwood Bats and Throne of the God-Pharaoh which can burn with token creation and for each tapped creature you control respectively
At that point, you might as well just run Chulane, Teller of Tales and go for an even better effect