While Judge Tower limits you to doing the same action only once per turn, Lazav is unique in that you can do it at instant speed, meaning your opponent will have to remember to do it at the start of each turn at their earliest opportunity
There werent quite enough tools to make it work with just M14, but the Hive and Hivelord give the tribe a whole new lease on life, and I would not be terribly surprised to see Sliver decks showing up in the Top 8 of events after M15 is released theres a lot of powerful stuff going on when they get going
Heading into the release of Rise of the Floodborn , Ravensburger increased production significantly while reducing the number of Starter decks from three to two
If you connect twice with it, youll draw 4 cards and discard 2 for just 3 colorless mana
It's a very minor bonus, and best suited for decks that want to sneak small saboteur creatures through in combat, like a Ninja deck, for example