Amarantha, Cruel Sequestrate

When Amarantha, Cruel Sequestrate enters the
battlefield you become the Monarch.
Pay half your life rounded down: Your
opponents gain life, divided as you choose, equal
to the amount of life paid. For each opponent
who gained 10 or more life this way take control
of target noncreature permanent they control.
Only activate this ability if you are the Monarch.