Players can't respond to your choice of a +1/+1 counter or haste, and they can't take actions while the creature is on the battlefield without one or the other
Sabrinas Gaze Both players reshuffle their decks and draw that many cards
I also give you the pros and cons of each method
The deck then adds a number of creatures and spells with proliferate to quickly multiply poison counters including Atraxa, Bloated Contaminator, Ezuri, Norn's Choirmaster, etc
There are plenty of ways to improve your collection, with some requiring you have a little money to spare, and others requiring that you just have a few friends who are also looking to trade
Both cards have similar effects, allowing you to play cards from your graveyard