Unburden the Soul

As an additional cost to cast Unburden the Soul, discard cards and/or sacrifice permanents, in any combination, in an amount equal to X.
Each opponent discards X cards and sacrifices X permanents. You gain X life.
"Some things are too heavy to leave unattended. You
find yourself with enough of them and you'll unbalance
not only yourself, but the entire world around you."
-Argon Altora