Esi, Tempest of the Jade Isles

Hexproof, Prowess, Indestructible, Trample, First Strike
Will of the Tempest-Whenever you cast a
noncreature spell, put a tempest counter on Esi.
Army of Servi-Whenever a permanent leaves the battlefield,
create a x/x white monk with prowess and indestructible
where x is the power of that permanent.
Remove 10 tempest counters: Destroy all of target opponent's nonland permanents.