Sure, your opponent gets too as well, but if youre dropping a creature with an exceptionally powerful enter the battlefield trigger, like Atraxa, Grand Unifier, a creature that is practically unstoppable like Emrakul, the Aeons Torn, or an enchantment that gives you free rein to do whatever you like Omniscience, you basically guaranteed a win
For a more non-technical analysis on fake cards affecting the game, I recommend reading this article
Easily one of the best cards in all of Tarkir: Dragonstorm , Voice of Victory does a lot for a creature
Alongside the Hivelord, Battle Sliver and Megantic Sliver give you uses for your extra mana to turn your Sliver army into an enormous force
An argument could be made to include The Master, MultipliedThe Master, Multiplied in this upgraded deck, but I'll leave that up to you
When I ran a poll on X that received plenty of votes, the voters agreed with me