Jasmine Solaris, Halo Mage

At the beginning of your upkeep, gain a poison counter for each legendary permanent you
control.
{6}{w/b}{w/b}, Pay 10 life: Transform Jasmine Solaris.
Put +1/+1 counters on it equal to the amount of poison counters you have, then remove all poison counters from you. Activate this ability only any
time you could cast a sorcery.