Shanna, the Bladed Dawn

Lifelink, vigilance
Shanna and Lathiel, Blade Dawn gets +1/+1 for
each other creature you control.
At the beginning of your upkeep, you may pay {x}, where X is the amount of life you gained
last turn. If you do, you draw X cards and
distribute X +1/+1 counters among any
number of creatures you control.