Sliver Hivelord - [Foil] Commander Masters (CMM) Preorder If a legendary permanent or

If a legendary permanent or an artifact entering or leaving the battlefield causes a triggered ability of a permanent you control to trigger

Flash Emerge {5}{U}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value

You may cast spells from the top of your library by removing a counter from a creature you control in addition to paying their other costs

If an artifact card was discarded this way

Sliver Hivelord - [Foil] Commander Masters (CMM) Preorder If a legendary permanent orSliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.) "This is the source, the line unbroken since the calamity that brought such monsters to our shores." Hastric, Thunian scout