Thuurix, Savage Born

Double strike, trample, protection from beasts.
When Thuurix, Savage Born enters the battleield, you may have it fight target creature you don't control. If so, Thuurix, Savage Born gains indestructible until end of turn.
{g}{3}: Thuurix, Savage Born fights target creature you don't control. It gains indestructible until end of turn