Among the new ones are V.A.T.S., which destroys all creatures that share a toughness of your choice, and it has split second, a throwback to the in-game system of targeting
Giving no maximum hand size as an effect is often a bonus for cards with something better to do
Still, for raw, explosive speed, nobody does it better
The best bit is that it lets you double-up your opponents counterspells, effectively giving you some protection from counters too
As great as drawing an extra card is, for most Modern decks, its hard to get into a spot where you can use this and hard to win once youre there
While there are all kinds of fun strategies that Proliferate can facilitate, from Planeswalkers to Sagas, they all pale when compared to Poison Counters