Tharizdun, Ebon God

Eminence -- Whenever a creature dies, if
Tharizdun, Ebon God is in the command zone,
put a chaos counter on it. This spell costs {1} less
to cast for each chaos counter on it.
When you cast Tharizdun, Ebon God, you may
remove any number of chaos counters from it.
When you do, you may destroy up to X target
nonland permanents, where X is the number of counters removed this way.(These counters remain
on Tharizdun, Ebon God as it moves to any zone
other than a player's hand or library