Herald Of Singularity

Whenever Herald Of Singularity enters the battlefield, you may scry X, where X is the
number of legendary permanents you control
then draw a card. If that card is called Leyline
Of Singularity, you may play it for free.
As long as you control Leyline Of Singularity
ignore the legends rule, and Herald Of Singularity
gains +1/+1 for each legendary permanent you
control.