It can be done at instant speed as well, meaning you'd be able to use its effect before your turn to get to use it twice
Today I explore its design and talk about what went wrong
While Poison certainly has some detractors, the mechanic is also quite popular, as evidenced by the recent price rise of this Poison Counter generating card
And if you cast it with 6 mana, you can swing in for that much and, in turn, swing the game directly in your favor with a 3 card draw and gaining 3 life
Whoever draws the most cards and spends the most mana tends to win games, and these two cards give your opponent the option of choking themselves on mana or giving you a card and mana advantage
Of those, 9 are reprints with alternate card titles and new art